Basal temperature in the first days of menstruation. Why measure basal temperature during menstruation. When to See a Doctor

Existing Methods Women's health monitoring has long been using data such as basal temperature during menstruation, as well as before and after critical days. This method is quite informative. It is associated with thermometry, which is carried out for at least a few months. The method is associated with delicate moments, it is able to reveal the secret of all the processes that take place in the body of the fair sex. For example, the basal temperature during menstruation will very clearly tell about a possible reproductive disease, as well as endocrine systems. All measurement results are recorded and then marked on a special graph. Gradually, the indicators add up to a certain picture of changes in thermometry data occurring during the observation period. The longer its duration, the more reliable and clearer the picture will be.

What is basal body temperature

Measurements of the usual temperature indicator, which are made, for example, with a cold (under the arm), are too approximate, they are rough. To fix the subtlest changes taking place inside, you need direct access to internal tissues. Here you need to clarify what basal temperature is. It is an indicator measured in accessible cavities. There is access to the mouth, vagina and rectum. It has been established that the least measurement is distorted when determining the temperature in anus. Therefore, they use just such a measurement. The change in readings is associated with the production of the hormones progesterone and estrogen in the body. When a corpus luteum forms at the site of a mature egg, progesterone is produced in much larger quantities. After the passage of critical days, progesterone in the blood decreases, as it large quantities leave the body with menstrual blood.

But at this moment, the maturation of the follicle begins, and the level of estrogen in the blood rises. An increase in progesterone causes general case an increase in temperature, and its decrease and the increase in estrogen contribute to a decrease in BBT. In this way, basal thermometry is a reflection of fluctuating hormone levels.

What is the basal temperature before menstruation - the norm

One of the most important evidence healthy condition the female body is considered the basal temperature before critical days. It can change, but within certain limits. Special meaning while preparing the body for pregnancy. If conception, alas, or fortunately, does not occur, preparation for menstruation will begin.

This period menstrual cycle considered the second phase. This should not only increase the level of progesterone, but also slightly decrease the level of estrogen. As a result, the blood should become hotter, as evidenced by the basal temperature. The norm is determined by the individual characteristics of the woman, her lifestyle, metabolism. On average, this value is above 37 degrees. At first it should be slightly higher than this indicator, and then slightly lower.

So, for example, a week or days 8-9 before menstruation, the first day of which is the beginning of the cycle, the level of thermometry readings should be from 37.1 to 37.2. After a few days, a gradual decrease in the received data should definitely begin. The basal temperature before the start of a new menstrual cycle, namely 2-3 days before it, should begin to fall, decreasing smoothly, gradually. Its values can be about 37 degrees and slightly lower. When the temperature does not drop, this is a signal that a gynecologist needs to be checked, since inflammation of the appendages is possible.

If before the monthly thermometry curve, 4-5 days before them, went down a little from the level of 37.1-37.2, and then rose again to these values and continues to remain within the same limits without rising higher, such a BT chart can signal that it's time to think about high probability the onset of pregnancy. The process and state of health must be kept under control, since in this situation there is a risk of miscarriage.

The start of a new menstrual cycle should never be celebrated strong movement thermometer up. The values may fluctuate slightly on the first of the days, and also on the second. But readings normally do not increase more than to 37.3. When growth intensifies more than expected, for example, to levels of 37.5 and above, you can to a large extent the probability of talking about the presence of an inflammatory pathology.

At values around 37.5 and slightly higher we are talking about adnexitis or inflammation of the appendages.
When fever reaches 37.9 and above, one can almost certainly suspect endometritis.

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On the third day of the menstrual cycle, or a little earlier, there should be a decrease in readings. At this point, progesterone production is reduced and continues to decline. It is followed by basal thermometry. The fall lasts all the time is menstruating. By the end of bleeding, BBT should be approximately 36.5 degrees. At the same time, depending on individual features metrics change, of course. But the temperature should clearly be lower than in the period before the critical days.

Basal temperature after menstruation - normal

The cessation of menstruation indicates the beginning of preparation for ovulation. In this period, an increase in the level of estrogen begins, while the basal temperature in women gradually decreases. Its value varies from 36.3 to 36.7. More high values will not allow the follicle to develop and form a healthy egg. When making measurements, you can pay attention that, as a rule, there are small fluctuations in the graph. The spread of values within 0.5 degrees lasts about a week. There is a special point to which attention should be paid. During the study period, there is a sequence of days when the received data almost does not change. At this point, the basal temperature after menstruation is constant. Its norm is not exactly defined. But after 5-6 days of this period of stability, three days are revealed, marked by a rise in the indicator by 0.1-0.2 degrees. A temperature drop of 0.2 degrees occurs only on one of the days. Then the curve returns to the previous level. It is this fluctuation of thermometry values that speaks of coming soon ovulation.

In this case, if you want to get pregnant, you need to make an effort. If pregnancy is not planned, sex should be protected.

Temperature standards at different stages

Deviations from average norm shouldn't scare. The reliability of the data in most cases can be reduced for many reasons. As a result, basal temperature is subject to variation. Therefore, in order to rely with a high degree of reliability on the resulting graph, observations must be carried out for not just a couple of months, but even years. Then it will be possible to compare the results obtained with the established average standards. When evaluating the data, as well as based on the available cyclic changes, which are characteristic of the female reproductive system, several distinct stages can be seen:

the first days of bleeding;
end days of menstruation;
the interval from critical days to the monthly onset of ovulation;
the actual period of ovulation;
the interval from ovulation to the approach of critical days;
the very eve of menstruation.

The indicators for these phases are approximately as follows:

Period. At the beginning, thermometry readings are kept within 36.9-37.3. By the end, these data are at the level of 36.3-36.8.
Ovulation. There is a dip in the data graph until the very low value, and then the growth of indicators to the area of 37 degrees.
Before ovulation. The thermometer shows a value much lower than before menstruation, about 36.4.
After ovulation. Stays on the thermometer characteristic temperature- about 37.1. Deviations of 0.1 degrees are allowed in both directions.
Before menses. There is a gradual and steady downward shift in readings. Then a slight, short-term rise is possible, but not higher than 37.3, which ends with a further decrease in temperature.

When the indicators do not correspond to the norms, there are suspicions about the presence of pathology. Its main feature is the absence of a pronounced smooth picture of data changes on the chart. This can occur in almost every woman, although not always in each of the cycles. If such a lack of movement of the graph is observed for more than one cycle, when 3-5 months are tracked, this indicates anovulatory pathological process. When the reduced difference between different phases the current cycle becomes apparent only once, it may then not be too dangerous. It's just that the ovaries rest during the cycle.

When, after ovulation, the temperature did not rise to the recommended values, but reached a rise of only 0.3 degrees, this indicates an insufficient work of the ovaries. In this case, the body lacks both estrogen and progesterone.

If thermometry showed an increase in the received data to a level of 37 degrees, but this value almost immediately fell and did not rise 3-7 days after the time of ovulation, then this indicates a low level of progesterone.

How to measure

In order for the readings marked on the graph to objectively reflect the changes taking place in the body, some important rules and avoid possible violations. First you need to prepare writing materials - a notebook and a pen. You can later transfer the thermometer readings to a computer, because there are many programs that allow you to easily and quickly visualize the resulting set, representing it in the form of a curve - a broken or smooth line. But on initial stage it is enough to be able to write down the testimony. In addition to the data determined on the thermometer, you need to record the date, as well as all the special situations that happened on the eve of the measurement.

Although the process may seem simple, it is useful to read the tips on how to correctly measure the morning basal rates. The measurement is supposed to be performed through the rectum.

Thermometry is carried out using the same device. A mercury thermometer is placed so that it penetrates into the cavity at a distance of 2-3 cm. BBT is measured for 6 to 7 minutes. When using an electronic device, the time is reduced to 1-2 minutes.
Before you measure, you need to get a good night's sleep. It is desirable that no alarms be observed for at least 6-8 hours. When this is not possible, the readings may not be informative. If a restful sleep was less than 4-5 hours before the measurement process, these readings will be distorted due to the awakening of the adrenal glands and their effect on the hormonal background.
Waking up before you start measuring basal body temperature can't even spin. In addition, of course, it is forbidden to get up, walk, sit down, drink or eat, and also shake off the thermometer.
It is necessary to have next to you in the evening: a pre-knocked down thermometer, pieces of paper and a recorder. Everything should be in close proximity, for example, on the nightstand by the bed.
The measurement time should be the same every day. It is optimal if it falls on the interval from 5 to 7 in the morning. Further, if necessary, you can continue to stay in bed, fall asleep again. It is allowed to change exact time measurement, but not more than 20-30 minutes.
It should be taken into account that the results obtained big share the probabilities will be distorted if a violation of the rules was made on the days of the measurement:

do not take psychotropic, sedative, stimulant drugs, alcohol;
do not have sex;
do not be nervous;
not be subjected to heavy physical exertion;
do not overeat and do not starve.

Other factors also influence the information content of the readings. It is reduced:

bowel disease and respiratory tract, as well as colds, poisoning, including exacerbations and chronic pathologies;
receiving hormone therapy;
moving, hiking, life changes;
manifestations of herpes.

Emerged acute condition, for example, a rise in temperature, the appearance of fever, negatively affects the quality of the readings over the next 2 weeks.

Basal temperature 37.2 - what does it mean

During the passage of the second half of the menstrual cycle, when the maturation of the oocyte occurs, there is Great chance embryo formation, and its implantation in the uterine mucosa. Of course, this situation expected in case of sexual contact. But, nevertheless, this is not always the case.

When critical days approach, thermometric indicators, measured every morning, are on the rise. In this case, it may be noted that the basal temperature is constantly kept at 37.2. What this means, not many people know. But doctors in such a situation suspect the occurrence of pregnancy. Indeed, in this case, a high level of progesterone is maintained. It is produced in order for the uterus to the inner layer able to grow enough. The embryo will then be implanted into it. It is progesterone that contributes to the thickening of the inner layer and maintaining a high temperature after preliminary growth.

If conception different reasons was not or it is objectively excluded, such a temperature of 37.2 can be kept long time due to an excess of progesterone or an incorrectly performed measurement process. If at the same time there are no sharp jumps noted on the received temperature graph, the readings do not deviate by large values, it is recommended to wait for menstruation and follow the subsequent change on the graph. When there is no movement on it, or it occurs spasmodically, perhaps these are the consequences of diseases, stress and other reasons. Seeing a gynecologist would be superfluous.

What is the basal temperature during menstruation should be observed? Basically, it is customary to measure BT immediately after waking up, without getting out of bed.

BT for all women is a mirror of health. By the value of BT, one can judge whether there are any inflammation processes, some reproductive problems.

What is the ideal basal temperature? In the usual normal condition BBT should begin to rise during ovulation to 37.1-37.4 degrees. Such indicators will ideally hold until the onset of menstrual period. 2-3 days before the onset of the menstrual period, BBT drops to 37-37.1 and constantly decreases until the last day of discharge.

But it also happens that the basal temperature during critical days, as well as after menstruation, does not decrease, but increases. What does this indicate, and what ailments can lead to such a phenomenon?

Why is BT rising?

In diseases such as endometritis or endomyometritis, the basal level begins to increase from the first days and can reach 37.5 degrees, but at the same time general temperature woman's body is normal.

The second reason for the increase in BBT is pregnancy, which was interrupted during the menstrual period. In the event that BT from the moment of ovulation until the end of the discharge reached a temperature of over 37 degrees, and in the last days or after the end of menstruation it went down very sharply, then there is huge probability that there was a disruption of the nascent pregnancy.

Another reason for the increase in BBT is the process of inflammation of all appendages. If the basal temperature during menstruation, from the very beginning to the end of the discharge, is over 37, then this may indicate the process of inflammation of the appendages.

Not less than significant reason increase in BBT is the process of inflammation of the tubes, as well as the cervix. If BT during menstruation, or rather, in the last 1-2 days rises sharply, then this indicates inflammation in the cervix and tubes (provided that the discharge goes from 4 to 5 days).

However, if BT increased by only 1 day, then this does not mean at all that the woman has any disease, or inflammatory process.

Measurement methods

Remember that there are rules for measuring BBT, and at any time you need to measure it correctly:

the time of its measurement must be strictly observed, it can be measured a little earlier, but not later than always;
basal temperature after critical days, during or before their onset should be measured with one thermometer;
it should be measured through the mouth, vaginally or through the rectum; you should choose only 1 measurement method and use it constantly;
it is necessary to measure BBT immediately after waking up and at the same time do not do any sudden movements. This factor can lead to a change in readings;
every hour, immediately after the woman woke up, BT will increase, it is for this reason that it must be measured instantly;
adhere to the measurement time, if BT is measured vaginally or through the rectum, then the procedure should take at least 5 minutes, if the measurement takes place through the oral cavity - 3 minutes;
only a mercury thermometer should be used, as it shows more correct results;
it doesn’t matter if BT is measured before or after menstruation - it must be measured in a supine position.

It is important to record the temperature in a special graph immediately after the measurement so that you do not forget the result afterwards.

BT before the onset of the menstrual period is constantly decreasing, this process is unchanged.

In order to get more accurate and correct indicators of BT, it is necessary to measure it in the interval from 6 to 8 in the morning. At the same time, it is very important that until the moment of measurement, the person has a quiet, healthy sleep at least 3-6 hours.

Just a few days after the end of menstruation, BT stays at around 36.5 to 36.9, after which it gradually decreases. And after ovulation, BBT goes up sharply.

Ideal performance

Fine? You need to focus on the following indicators:

the day before the end of menstruation, BT decreases to 36.3 degrees;
before the onset of ovulation, the basal temperature can rise to 37 degrees; it is believed that the female egg at this time has already matured. It was at this time that a woman should adhere to a certain temperature regime;
during ovulation, the temperature can rise to 37 degrees and above and stay until the onset of menstruation;
before the start of menstruation, BT should gradually go down.

If an egg is fertilized, then BBT with a mark of 37 degrees and above will last throughout the entire 1st trimester of pregnancy.

BBT before the onset of menstruation is not the same for every woman, since each human body individual. But still there are allowable norms both increase and decrease in BBT. What can such indicators indicate?

If before the onset of menstruation the temperature reaches 36.9 degrees, but in the second half no jumps are noticeable, then this indicates that the egg has not matured. You don't have to be too worried or upset about this. There are several anovulation periods throughout the year. But in the event that such indicators are observed constantly, you should seek help from a specialist.

BT at a mark of 37.1 to 37.5 indicates the onset of pregnancy. At the time of fertilization, progesterone is released in the body of a woman. Due to this hormone female body all supported the necessary conditions in order for the fetus to develop properly and actively.

If BT before the onset of menstruation shows a mark of 37.3, then this indicates that some process of inflammation is taking place in the female body. This mark can be reached if there is infection with a general increase in body temperature. This factor is also reflected in the BT indicator.

If before the onset of menstruation, the BT indicator reaches 37.4 degrees, then this may indicate that there is not enough estrogen in the female body. In any case, with this indicator, in no case should you postpone going to a specialist.

Reasons for a change in basal temperature

In addition to all of the above factors, there are several more that can affect the performance at the time of measuring BBT:

use alcoholic beverages the evening before the measurement;
the woman's sleep lasted less than expected;
in the event that sexual intercourse was performed 6 hours before the measurement of BT.

From the moment you decide to take on the measurement of BBT, consult with a specialist first. Consultation is especially important if the woman is taking any medications, which can lead to a change in indicators. Among these medicines include: contraceptives, antibiotics, various hormonal and sedatives.

Basal temperature before the onset of the menstrual period, as in any other period, is a very sensitive value. Its performance can be greatly influenced by many different factors. When absolutely all rules must be observed.

If at the time of its measurement you find that you have these or those deviations from the norm, then as soon as possible you should seek help from qualified specialist. Remember that measuring BBT during the menstrual cycle is just as necessary as on any other day.

By measuring basal temperature, every woman can pay attention to the process and quality of work own organism, determine the moment of ovulation, find out about the onset of pregnancy. In order for all these processes to be observed, the measurement of BT must occur over several cycles in a row. These factors are very important for every woman, and that is why you need to be as attentive as possible to your own health. At the slightest deviation, consult your doctor.

Frequently asked questions about BT charts.

Normally, 2-4 days before the onset of menstruation, BT begins to decrease and reaches 37.0-37.1 by the 1st day of the cycle. Then, during normal menstruation BBT continues to decline, despite the amount of blood released.

If a woman has a hidden current inflammation of the uterine mucosa (endometritis) or the uterus itself (endomyometritis), then during menstruation, BT will go UP, sometimes reaching 37.5-37.6 with normal temperature in armpit.

The rise in BBT in the last 1-2 days of menstruation (if it lasts at least 4-5 days) may indicate inflammation of the tubes or (much less often) the cervix - without affecting the uterus itself.

A sharp rise in BBT for one day during menstruation does not mean anything: inflammation cannot start and end so quickly.

Is it necessary to measure BBT during menstruation?

BBT measurements can be started both from the 1st day of the menstrual cycle, and on the day the discharge stops (a matter of your convenience).

What should be the BT in the first phase?

Normally, the temperature of the first phase is kept within 36.5-36.8.

But often on the charts, estrogen deficiency is visible, which is expressed high level BT in 1 phase. In such cases, doctors prescribe estrogens, such as Microfollin. But only if these suspicions are confirmed hormonal analysis blood.

Another unusual phase 1 schedule occurs in the presence of inflammation of the appendages. After an exacerbation during menstruation, the inflammation may subside, but from time to time give a small, purely local exacerbation, which is reflected in the basal temperature. BBT can rise to 37.0-37.2 for 1-2 days, and then decrease again.

What could be the reason for unexpected temperature rises in the first phase?

Stress, travel, alcohol intake, colds with fever, sex in the evening (and even more so in the morning), measurement of BBT at an unusual time, late going to bed (for example, went to bed at 3 o'clock, and measured at 6 o'clock), a sleepless night and much more affect BT. Eliminate the "unusual" temperature by connecting with a dotted line normal readings. Try to install and mark in the chart possible cause deviations.

What should be the BT in the second phase?

Normally, the temperature of the second phase rises to 37.2-37.3. But more important is the difference in average temperatures (read below).

Low temperature in the second phase (relative to the first) may indicate insufficient function corpus luteum(progesterone). To support the second phase (and pregnancy) prescribe additional reception progesterone (most often - Utrozhestan or Duphaston) - but only if these suspicions were confirmed by a hormonal blood test.

Approximately 2-4 days before the onset of menstruation, BT begins to decrease and by the 1st day of the cycle reaches 37.0-37.1.

If BBT rises at the usual time, but then does not fall before menstruation, stays above 37.0 for almost the entire menstruation, and decreases in the last days or after the end of menstruation, then this is suspicious of a pregnancy that aborted during the days of menstruation.

If BBT in the second phase is not high (36.9-37.0), and by the time of menstruation it begins to rise and stays above 37.0 throughout menstruation, then most likely it is an inflammation of the appendages.

If one or more times the temperature drops below 37.0 degrees - this is evidence of the death of the egg, and the graph reflects a sharp decline hormone levels at that moment.

If the temperature of the second phase is not high enough (there is no difference of 0.4 degrees), does this mean that I have a deficiency in the second phase?

Perhaps, but not necessarily. BT does not provide any information about the usefulness of the function of the corpus luteum - neither about the length of the phase (the temperature can rise even a few days after ovulation), nor about the level of progesterone produced by the corpus luteum (the thermometer readings do not allow determining the quantitative level of progesterone in the blood - to assess the level progesterone need to take a blood test a week after ovulation).

On what day relative to the rise in temperature does ovulation occur?

Before ovulation, the temperature drops, and after it, it rises. A rise in basal temperature means that ovulation has already occurred.

A drop in temperature at the time of ovulation occurs only in a very small number of women. Because the sharp drop temperature is extremely rare, this sign cannot be absolutely reliable in determining the ability to conceive, therefore, to determine the approach of ovulation, it is better to use the other two signs.

If the schedule does not show ovulation, does this mean that it was not there or do I have problems with hormones?

The BT measurement method is very unreliable! In no case should it be relied upon in diagnosing any violations or in prescribing hormonal drugs! In cases where there is no obvious second phase on the graphs, it is necessary to carry out ultrasound monitoring, and in the presence of ovulation by ultrasound, take a blood test for progesterone a week after ovulation, if the results of both studies are normal, such graphs can be considered a "feature" of the body and stop measuring temperature, if it is not indicative;

Is there more than one ovulation per cycle?

Cases where two (or more) eggs are released from the ovaries during one cycle constitute a very small percentage of total number ovulation. However, this output always occurs within 24 hours. Multiovulation leads to the birth of twins.

If the schedule is perfect, does this mean that there was an ovulation? Does this mean that you can accurately guess the day of ovulation?

The method does not provide accurate information about the presence of full-fledged ovulation even in the presence of two-phase schedules (for example, in the case of premature luteinization of the follicle), as well as accurate information about the timing of ovulation that has occurred (the temperature may rise the next day, and a few days after ovulation - this is in normal range),

What should be the temperature difference between the first and second phases?

The difference between the average BBT of the second phase and the average BBT of the first phase should be at least 0.4-0.5. Except in cases where a small temperature difference is only a feature of the woman's body, and not an indicator of the presence of any disorders. This is usually checked additional methods examinations - ultrasound, blood test for hormones, etc.

If during the whole cycle the temperature on the graph keeps approximately at the same level or the graph looks like a "fence" ( low temperatures constantly alternating with high), and not biphasic, this means that in this cycle there was most likely no ovulation - anovulation. To confirm this fact, it is necessary to conduct ultrasound monitoring for several cycles to establish the presence or absence of ovulation. Healthy women may have several anovulatory cycles per year, but if such a picture is observed in all cycles, you need to consult a doctor. At total absence ovulation, a woman does not have full menstruation - only "menstrual-like bleeding" (which can be either regular or irregular).

How many days should the ascent be?

Normally, the rise takes no more than 3 days. A more gentle rise reflects a lack of estrogen and weakness, inferiority of the egg. Fertilization in a cycle when BBT is high in the first phase, and the rise takes more than 3 days is very problematic.

What is the duration of the phases and why is the cycle always different?

The first phase (prior to ovulation) can be very variable in duration, as in different women, and the same one. Usually, the length of this particular phase of a woman's cycle affects the delay in menstruation - for example, if the maturation of the follicle is slower or does not occur at all. The second phase (after ovulation) is not the same for different women (from 12 to 16 days), but is almost constant for the same one (plus or minus 1-2 days).

The lengthening of the first phase of the cycle is not a typical phenomenon, but this does not affect the normality of the cycle. A cycle with an extended first phase is normal.

If the second phase is shorter than 12 days, then this is a sign of insufficiency of the second phase, low level progesterone.

What BT indicates the onset of pregnancy?

If there is no menstruation, and BT is kept within the second phase for more than 18 days, this indicates a possible pregnancy.

You can be sure of the onset of pregnancy if the level of high temperatures persists for 3 days more than your usual corpus luteum phase. For example, if it is usually 12 days (maximum 13), but one day it lasts 16 days, then you are almost certainly pregnant.

If a third level of temperature appears during a normal two-level cycle, then you are almost certainly pregnant. This third level of temperature occurs due to the additional progesterone in the body of a pregnant woman. Unfortunately, however, not all women have such a three-level schedule.

If menstruation is scanty or unusual, and BT is kept on elevated level- possible pregnancy against the background of the threat of interruption.

When does implantation take place and how does BT behave at this time?

Implantation gestational sac occurs on the 6-8th day. It happens that at this time the temperature drops by 1, a maximum of 2 days. When you see a drop in temperature in the middle of the luteinization phase on your graph, this does not mean that you are pregnant. Moreover, such a picture is not required during pregnancy.

Is it necessary to measure BBT while taking OK or other hormonal drugs?

BBT should not be measured while taking OK - under the influence of the hormones taken, it will not be indicative.

The following sources were used in writing this article:

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Types of temperature curves:

Type I - temperature increase in the second phase of the cycle by at least 0.4 C; there is a "preovulatory" and "premenstrual" temperature drop. The duration of the temperature rise is 12-14 days. Such a curve is typical of a normal biphasic menstrual cycle;

Type II - there is a mild rise in temperature (0.2-0.3 C) in the second phase. Such a curve indicates estrogen-progesterone deficiency;

Type III - the temperature rises shortly before menstruation and there is no "premenstrual" fall. The second phase is shorter than 10 days. Such a curve is typical for a two-phase menstrual cycle with insufficiency of the second phase;

Type IY - monotonic curve (no changes throughout the cycle). Such a curve is observed during an anovulatory (ovulation is absent) cycle;

Y type - atypical (chaotic) temperature curve. There are large temperature fluctuations that do not fit into any of the above types. This type of curve can be observed with severe estrogen deficiency, and may also depend on random factors.

An increase in basal temperature occurs when the level of progesterone in the blood serum exceeds 2.5-4.0 ng / ml (7.6-12.7 nmol / l). However, monophasic basal temperature has been identified in a number of patients with normal level progesterone in the second phase of the cycle. In addition, monophasic basal temperature is noted at approximately 20% of ovulatory cycles. A simple statement of a two-phase basal temperature does not prove and normal function yellow body. Basal temperature also cannot be used to determine the time of ovulation, since a two-phase basal temperature is also observed during luteinization of a non-ovulated follicle. However, the duration of the luteal phase according to basal body temperature and low speed the rise in basal temperature after ovulation is accepted by many authors as criteria for diagnosing the syndrome of luteinization of a non-ovulating follicle.

Basal body temperature (BT) is considered the lowest temperature indicator of the human body. The most reliable data is obtained through measurements in the vagina and rectum.

The need to study temperature values is based on the close relationship hormonal background women and the process of thermoregulation. With fluctuations in the level of progesterone, which is directly related to fertilization, the indicators change. It happens on different stages menstrual cycle. Thanks to the measurement and analysis of basal temperature during menstruation, the condition is assessed reproductive health and detect deviations in a timely manner.

This gynecological method has been known for a long time. Many doctors recommend keeping a basal temperature calendar, despite the fact that this auxiliary method study normal course physiological processes.

There are more reliable modern ways, but in certain situations, a basal temperature chart before menstruation can come in handy. Great importance has the correctness of measurements and interpretation of data.

The main requirement is to take measurements every day, regardless of the state of health. The indicators are recorded in the chart for 3-4 months. Among the mandatory items should be dates and temperature values. Separately, days are marked when the usual way of life was violated: feasts with alcohol, illness and stress, medication.

How temperature changes during the menstrual cycle

Each phase of the cycle has its own standards and temperature standards. Any fluctuations in the values of healthy woman is a reaction to changes occurring in the body.

The study of basal temperature before menstruation allows you to identify and understand many important points. Based on the information received, doctors and women themselves learn about hormonal disorders, days of ovulation and future periods, the presence of gynecological diseases. The cyclic calendar is used when planning and diagnosing conception, as well as in cases where pregnancy is undesirable and must be prevented.

essence gynecological method is to evaluate cyclical changes. During menstruation, basal temperature can rise and fall. The values depend on how the egg behaves.

At non-pregnant woman on the first day of menstruation, the temperature remains normal - within 37 degrees. The same indicators are noted a week before menstruation. With each subsequent day, the values \u200b\u200bbegin to fall, fluctuate and last day become extremely low - 36.3–36.5 ºС. This is the most optimal period for the formation and growth of the follicle.

When the breakthrough happens dominant follicle, a corpus luteum is formed that produces progesterone, which is responsible for conception and prepares the uterus to accept the egg. A sharp release of the hormone during menstruation causes a temperature rise to 37–37.5 ºС. This is the most favorable time for pregnancy.

If conception has occurred, the data in the chart will not change. With accurate fixation in indicators, there should be stability. This picture indicates the fertilization that took place. You can test your assumptions with a test.

By temperature chart determine even the day of conception. This is usually reflected in temperature fluctuations: at first it drops sharply, after which it rises rapidly. Such jumps occur under the influence of progesterone. When its level drops, the indicators decrease, indicating that fertilization has not occurred.

When studying the graph, it is necessary to take into account the errors and factors that affect the reliability of the values. The reason for incorrect data may be:

stress;
gynecological and colds;
serious physical activity;
sexual contacts;
alcohol consumption;
taking contraceptives and drugs;
bad (short) sleep.

These factors increase blood flow and provoke temperature fluctuations during menstruation.

What does the rise in basal temperature mean?

Before the onset of menstruation, the values vary between 36–36.5 ºС. This is normal, but temperature deviations may occur depending on climatic conditions, health status, lifestyle, physiology.

The growth of indicators is accompanied by the second phase of the menstrual cycle, when ovulation occurs. Heat(37–37.5 ºС) may indicate a pregnancy.

Atypical situations are also identified when changes and an increase in basal temperature are caused gynecological diseases and hormonal imbalance.

Let's single out the most frequent deviations associated with an increase in basal temperature before menstruation:

progesterone deficiency. The presence of a serious pathology is accompanied by a slight increase in temperature, which lasts no more than 7 days. The difference is 0.4 degrees, while the cycle is reduced to 10 days, which provokes the onset of menstruation ahead of schedule.
Risk of miscarriage. With a confirmed pregnancy, a temperature increase of up to 37.2 ºС and late menstruation may indicate a threatened miscarriage and ectopic pregnancy.
. The inflammatory process that has begun in the first days of menstruation causes an increase in temperature to 37 ºС. Such fluctuations before menstruation are one of the signs of pathology in mucous layer uterus. Similar phenomena are observed with inflammation of the appendages.

It is important! If, against the background of stable changes during menstruation, sharp temperature fluctuations are observed, consult a doctor. Indicators of 38 ºС and above indicate the presence of serious gynecological diseases.

How to measure correctly

The resulting BT chart during menstruation is a kind of health scale that reflects complete picture changes in the female body. The reliability of the information of this technique depends on the correctness of the procedure.

Two measuring methods are used: rectally (in the rectum) or vaginally (in the vagina). To determine pregnancy, the most effective measurement is considered rectal temperature. Using mercury thermometer the measurement time is 5–7 minutes, it is enough to hold the electronic device for 1 minute. Insertion depth - 2-3 cm.

The procedure is carried out in the morning after waking up, preferably at the same time. It is better not to get out of bed, so the thermometer should be within reach. When measuring, walking, bending and squatting are unacceptable. Any movement affects blood circulation and is reflected in the performance.

In order to determine the day of ovulation, you can use alternative method- . You can read more about the procedure in a separate article on our website.

Anyone who is planning a baby in the near future or simply monitors their health is interested in the features of the body. Many women measure their basal temperature, because it helps to understand whether the reproductive system is functioning normally. To determine if everything is in order, you need to know what indicators a woman should have in different periods cycle.

Measurement Rules

Before talking about specific values, it is important to find out exactly how the basal temperature should be measured before menstruation. The most accurate readings will be only if a number of conditions are met. So, it is desirable to take measurements at the same time, in the morning, until the woman gets out of bed. Doctors recommend monitoring the basal temperature, and not taking measurements in the mouth or armpit. It is believed that in the rectum it is most reliable.

It is also important to sleep at least 4 hours before the measurement. In addition, it must be remembered that during illnesses that are accompanied by an increase in temperature, it makes no sense to carry out such measurements, the picture will be distorted. Any intestinal disorders, significant changes in the regime of the day, reception sleeping pills, alcohol can also affect morning performance. On these days, the temperature can be omitted or taken into account when calculating averages.

Plotting

It should be noted that there are general average indicators of what the basal temperature should be before and after menstruation, during ovulation, as well as at other periods of the cycle. But each organism is individual, therefore, in order to understand whether there are problems with reproductive system, it is necessary to regularly record the obtained values and build graphs. O possible diseases judged by temperature fluctuations, by the difference in indicators in the first and second phases, by the nature of their changes. The graph is built as follows: the days of the cycle are marked along the horizontal axis, and the measurement values are marked along the vertical axis. Normally, two phases should be clearly visible on it. In the first of them, the temperature is lower and is at the level of 36.5 degrees, and in the second, which occurs after the release of the egg, it rises to 37 or more. To understand if there are any problems, doctors recommend counting the averages in each of the phases. The difference between them should be at least 0.4 degrees.

Cyclical changes

If it is clear with the indicators in the first and second phases, then the question of what the basal temperature should be before menstruation worries many women. Ideally, in the second phase, which begins after ovulation, the values \u200b\u200bshould be above 37 degrees. By the beginning of menstruation, they may decrease slightly. The first days of menstruation are characterized by the fact that the temperature drops every day, reaching the level of 36.5-36.8 degrees by the end of them.

Before ovulation, it can fall even more and rise sharply immediately after the release of the egg. This indicates that the second phase has begun. If you measure the indicators regularly, then by the deviation of the values you can suspect various problems. Despite the fact that many people talk about the meaninglessness of measurements during critical days, the temperature during this period can tell you which aspects women's health worth paying attention. The basal temperature during menstruation should fall, if this does not happen, then you should think about passing the examination.

Possible diseases

On average, a couple of days before the start of the discharge, the indicators should begin to decrease. A gradual decrease in temperature should also occur during critical days. If, instead of lowering during menstruation, there is a sharp rise to about 37.6 degrees, then this may indicate the development of endometritis or endomyometritis. Of course, an increased basal temperature during menstruation should alert, but making a diagnosis using only one measurement is unacceptable.

But in the case when in the second phase the temperature barely reaches 37 degrees, but with the onset of critical days it rises above this level, inflammation of the appendages can be suspected. In addition, measurements provide an opportunity to identify problems with the tubes or cervix. It is worth talking about the probable inflammation of these organs in cases where temperature indicators increase by the 4-5th day of menstruation. It is worth paying attention to those cases when the basal temperature before menstruation is 37.2. If at the same time it does not drop significantly with the onset of critical days, then it is better to do a test. Perhaps this is a pregnancy with a threatened abortion. But if the temperature has risen for one day, then you should not worry, this still does not mean anything. Also, do not forget that measurements alone are not enough to make a diagnosis; this will require a series of examinations.

First phase

Having dealt with the temperature during critical days, you can find out how the body should behave after they end. Normally, the thermometer readings should be at a level of about 36.6, but they will depend on the personal characteristics of each girl or woman. For some, they will stay at the level of 36.4 throughout the first phase, for others they can rise to 36.8 degrees. But both cases described are perfectly acceptable.

But a more significant rise in temperature indicates that it is better for a woman to consult a gynecologist. If the indicators in the first phase approach 37 degrees, then this may indicate a lack of estrogen. But this can only be confirmed with a blood test for hormones. You should also be wary of a rise in basal temperature during menstruation and its periodic increase by 1-2 days throughout the first phase to a mark of 37 degrees and above. This may indicate inflammation.

Indicators during ovulation

An unusual basal temperature before or during your period may indicate a number of problems. But measurements on other days are no less revealing. Normally, the next morning after the release of the egg, a woman observes an increase in temperature. It can be either abrupt or gradual. For some, on the very first day, it increases by 0.4 degrees, for others, this difference is gained in 2-3 days. Both of these situations are perfectly acceptable. In the event that the rise in values takes more than 3 days, one can suspect the inferiority of the egg released from the ovary or a lack of estrogens. As a rule, it is almost impossible to get pregnant in such a cycle.

Start of the second phase

If the indicators after the release of the egg do not reach 37 degrees, then this may indicate the inferiority of the corpus luteum. But it is not worth talking about the insufficiency of the second phase only by the temperature value. It is important to look not at the indicators themselves, but at the difference in the values that were in the first and second parts of the cycle. If measurements are taken in degrees Celsius, then it is at normal functioning organism will be 0.4 or even higher. Although it is not worth making any diagnoses without an examination. The insufficiency of the second phase and the appointment of progesterone preparations is possible only after an appropriate analysis.

End of the second phase

Regardless of what kind of values a woman had after and before ovulation, the basal temperature before menstruation should begin to decrease. At the same time, its value by the first day of the cycle should normally not exceed 37 degrees. If, according to the schedule, ovulation took place more than 14 days ago, and the temperature does not drop, then you can do a test that helps to early stages diagnose the conception of a baby. The basal temperature before menstruation is 37 degrees is considered quite normal. But at the same time, it is important that it decreases with the onset of secretions. If menstruation began, and the fever lasted a few more days and fell only by the end of the critical days, then this may indicate an aborted pregnancy.

Phase duration

In addition to knowing what the basal temperature should be before menstruation, it is important to know how long each part of the cycle can last. So, the length of only the second part of it is relatively constant, depending on the characteristics of the body of each particular woman, it can be 12-16 days. But the ideal option is considered in which it lasts 14 days. But the long first part of the cycle can range from 10-12 days to several weeks. Of course, with a cycle of 28 days, it lasts about 14 days, during which time the follicle has time to mature and ovulation occurs. But for some women, it can be much longer. At the same time, all the necessary stages go through in their body: the growth and maturation of the follicle, the release of the egg, the formation and functioning of the corpus luteum.

Norm Options

It is not worth talking about some diseases only by the level of temperatures. But this information is needed in order to suspect some problems and pass necessary research to confirm or refute the diagnosis. At the same time, it is impossible to judge only by one cycle, it is necessary to carry out measurements at least for three months. If the picture repeats every month, then together with the gynecologist, you can draw any conclusions by analyzing how the basal temperature changes before menstruation. The norm for it cannot be set in absolute values. It depends both on the values in the second and in the first phase. If a woman's indicators before ovulation are around the mark of 36.4 degrees, then after it they may not exceed 36.9. At the same time, an increase in temperature to 37 by the day of menstruation will not speak of approaching critical days but about the onset of pregnancy.

Anovulatory cycles

Ideally, a woman should have a biphasic basal temperature chart. Before menstruation, it decreases slightly, but at the same time, the difference between the averages of the first and second half of the cycle fits into the norm. But it is quite acceptable if ovulation is absent once or twice a year. In this case, the indicators can change every day, the temperature can rise sharply, then fall. This does not indicate any problems, just this month there will be no ovulation.

Important nuances

If on any of the days before the measurements the normal daily routine was violated, then the temperature will not be indicative. If you drank alcohol in the evening, got up a couple of hours before the measurement to go to the toilet, or in the morning there was closeness, then the obtained values \u200b\u200bmay differ significantly. Even a banal indigestion or stress the day before can cause fluctuations in the temperature curve. This, by the way, is one of the reasons why it is impossible to judge the state of a woman's health on the basis of one graph alone. But at the same time, it should also be noted that even an ideal schedule in which two clear phases emerge with a good difference in indicators, and the basal temperature before menstruation is 36.9 degrees, does not mean that the woman is in excellent health. For example, measurements will not give any information about the size of the endometrium in the uterus or adhesions in the tubes. Therefore, even when normal you should not neglect visits to the gynecologist.