Bt 36 5 before menstruation. What basal temperature indicators are considered normal before menstruation? Basal temperature before menstruation - are the indicators reliable?

Basal temperature before menstruation: why measure it? First, let's look at the definition of the term. We all know well that the normal temperature in the armpit should be 36.6 °C. If our body temperature is lower or higher than normal, we immediately feel unwell and want to take sick leave. But basal temperature does not affect us that way. We will not be able to feel even a sharp temperature drop of half a degree.

So, basal temperature is, roughly speaking, the temperature of our mucous membranes, which characterizes some of the processes occurring inside our body. It’s very interesting to observe this as a doctor, but we are not all doctors. Why might such information be needed by an ordinary person, or more precisely, a woman, since mostly data on changes in BT is important to her? The fact is that basal temperature changes during the period of ovulation, therefore, if there is a question about family planning, then mastering this method is important for a woman who wants to get pregnant.

We measure BT and build a graph

Measuring basal temperature is quite simple: this method uses a regular thermometer. Just measure the temperature not in the armpit, but in the rectum, vagina or mouth. By measuring your temperature before your period, you can find out how soon your next period will come. And, by the way, if ovulation has occurred, this can be determined during the period before menstruation.

But I wonder what the basal temperature (BT) before menstruation will be in the absence of pregnancy, with positive ovulation? What do the numbers on the thermometer characterize? Let's look at various situations and possible reasons for deviations from generally accepted norms.

Basal temperature before menstruation 36.9°C and there are no jumps in values on the graph in the second half of the menstrual cycle. This indicates the absence of a mature egg. This cycle was probably anovulatory. But this does not give grounds to diagnose a woman with infertility. Since even 20-25 year old women with a good ovulatory reserve can experience such cycles 2-3 times a year.

If basal temperature before menstruation 37.0, 37.1, 37.2 degrees, then this may indicate pregnancy. And, most likely, this is what happened. And if the rise in BT was before the expected menstruation, perhaps they will no longer be, at least in the next nine months.

Basal temperature before menstruation 37.3°C a little higher than expected. Perhaps a deviation from the norm is associated with nervous overstrain, inflammatory processes in the body. In this situation, it is advisable to consult your doctor.

Basal temperature before menstruation 37.4°C often associated with estrogen deficiency. It is unlikely that you will be able to get pregnant during a period of elevated basal temperature. But you shouldn’t put off going to the doctor. The gynecologist can refer you to an endocrinologist for an appointment. You may have to wait a little while planning your pregnancy. It is important to identify the cause of such a high basal temperature.

If you decide to use this method when planning a pregnancy to determine possible reasons for the lack of conception or to determine the day of ovulation, remember that a stable (for at least 3 menstrual cycles) increase in basal temperature before menstruation, as well as its decrease below 36.5 ° C - criteria that should not be ignored. If you are trying to get pregnant, then any changes in the temperature chart that you do not understand should be explained by your gynecologist.

Back in the last century, doctors found out that if you measure the temperature inside a woman’s body day after day, you can learn a lot about how her reproductive organs function.

Basal temperature before and after menstruation allows you to track important changes in the female genitourinary area. Using daily temperature recording, the most suitable or unlikely days for conception are calculated. The BT method helps to “detect” pregnancy even before the delay, that is, the end of the cycle, and also to identify deviations in women’s health.

Basal temperature is changes in temperature recorded rectally, orally or vaginally in a woman immediately after a night’s sleep.

Regardless of the method, for accurate measurement results you should follow some rules:

The selected measurement method must be used only once. If during this cycle you started measuring BT in the anus, then continue until your period. And only in the next cycle can the method be changed;
Temperature readings are recorded daily for at least 3-5 months on a special schedule.
Measurements are taken early in the morning at a fixed time immediately after the woman wakes up;
During the measurement periods, deep sleep should be at least 3-5 hours. That is, if you got up to go to the toilet in the morning, 1-2 hours before getting up, then the measurement result will be unreliable;
The graph should reflect not only the basal temperature numbers, but also the factors influencing its changes: stress, sexual contact, taking alcohol or medications, changing the time of the study. All this can suddenly increase BT. Therefore, make notes under the schedule. For example: “5 dc – woke up 3 hours later.”

But these are not all the important nuances. Read the detailed article and how to interpret it.

BT in different phases of the cycle

The female body is a complex mechanism controlled by numerous hormones. They are the ones who influence digital temperature changes in different cyclic phases: it decreases or increases. That is, the graph clearly shows two phases: before and after ovulation.

Basal temperature in the second phase of the cycle is an important indicator of how the female organs function. But measuring it only at this time is not enough: you need to see the whole “picture” as a whole, that is, measuring BT over a whole month, or preferably several, is important.

Let's analyze what basal temperature should be at different cyclic phases in a non-pregnant young woman.

Time of menstruation

On the first day of the cycle, the readings are usually not high, but not low either - 36.7-36.9 degrees. Further, an increase in temperature may be observed, but it does not rise above 37 degrees. By the end of the critical days (on days 4-7), BT decreases.

Egg maturation phase (first phase)

During the period when the egg matures, immediately after menstruation, numbers from 36.2 to 36.6 degrees are considered optimal. There may be a slight drop before ovulation. The temperature will begin to rise as soon as the egg begins to leave the follicle.

Luteal phase (second phase)

The temperature after ovulation increases and reaches maximum numbers (37-37.5 degrees). This happens due to the active production of the hormone progesterone.

At the final stage of the luteal phase, the indicators begin to decrease slightly again. The optimal BT before menstruation (2-4 days before) is considered to be a basal temperature of 36.8-37 degrees.

Your rectal temperature before your period may not coincide with the reference temperature. A difference of plus or minus 0.3 degrees is considered normal, because each of us has our own characteristics. That is why it is extremely important to conduct research for several months to identify “your” indicators.

However, the main thing here is the general trend: the basal temperature in the second phase of the cycle increases by 0.4-1 degrees, and a few days before menstruation (2-3 days) it decreases slightly (by 0.2-0.4 degrees).

Deviations

Sometimes the results of basal temperature readings before menstruation may have readings that differ from the standard ones. The reason for these changes lies in the malfunction of hormones, which occurs due to two factors:

Deviations in the functioning of the reproductive system;
Impending conception.

Let us analyze the features of deviations in rectal indicators when the BT chart indicates the presence of diseases of the female genitourinary system.

Anovulatory cycle

A monophasic graph, when measurements are recorded at almost the same level, indicates the absence of ovulation. In this case . This situation is often caused by hormonal problems. Regardless of the reason, a woman will not be able to get pregnant.

Almost every woman can experience an anovulatory cycle 1-2 times a year. In this case there is no reason to worry. However, if the graph shows a monotonous straight line for a long time, consultation with a gynecologist to identify and eliminate the causes is necessary.

Progesterone deficiency

A lack of the hormone progesterone provokes a condition called progesterone deficiency. Due to illness, temperatures rise very slightly and even a week before menstruation do not reach 37 degrees.

A distinctive feature of the disease is the shortened second phase of the cycle, which causes menstrual bleeding to appear earlier than expected.

Inflammatory diseases

Inflammatory processes in the uterine mucosa cause endometritis, which can also be recognized using a curve on the graph.

A striking, characteristic feature of the disease is rectal readings around 37 degrees on the first day of the cycle, and after a slight drop they rise again. Such deviations from the norm require mandatory consultation with a specialist.

In case of inflammation of the appendages (adnexitis), BT is consistently high throughout the entire cycle – 37 degrees and above.

When to see a doctor

In addition to important knowledge about what basal temperature should be before menstruation, a woman needs to record the duration of each phase.

The length of the second (luteal) phase is normally 12-13 days. As for the indicators before ovulation, the time frame here is looser. However, in a healthy woman such fluctuations should be negligible. Moreover, such “minor violations” should only be noted within the first phase.

We list the important signs, after identifying which a woman needs to undergo a full gynecological examination:

After ovulation, the basal temperature rises, but just a little - by 0.3 degrees or even less;
The numbers recording changes throughout the entire cyclic period have approximately the same indicators or exceeded or decreased values;
In the middle of the cycle there is a very slow rise in values;
The first phase lasts more than 18 days, and the second – less than 10.

BT and pregnancy

However, indicators that differ from the norm can be evidence of a pleasant and often long-awaited event.

After all, many women are starting to use this technique to calculate the best time to conceive and quickly.

What should be the basal temperature after ovulation if a woman has conceived a child?

Sometimes, about a week after ovulation, BT decreases sharply or slightly - by 0.2-0.5 degrees. This is the so-called implantation retraction - the moment when the egg attaches to the wall of the uterus. It does not last long - on the chart the decline is usually only for one day. Then the indicators return to their previous elevated values. Before menstruation, the basal temperature remains at 37.1 and above (and does not decrease, as usual).

During pregnancy, temperature data after the release of the egg remain high for a long time: from 37 to 37.5 degrees. If these factors are accompanied by a delay in menstruation, and the breasts feel tight or tender, then the pregnancy test may be positive.

However, if these symptoms are accompanied by bleeding from the vagina, you should definitely visit a doctor, as in this case there is a high risk of miscarriage.

If pain and fever are added to the above symptoms, you need to urgently go to the hospital, as these signs may indicate an ectopic pregnancy.

Is the method reliable?

Patients and gynecologists have been using rectal temperature values for a long time, despite the fact that new, modern diagnostic methods have already appeared.

Physical exercise;
Stressful conditions or psycho-emotional tension;
Taking hormonal medications;
Infectious diseases;
ARVI;
Drinking alcohol;
Sexual contact;
Short or excessively long night sleep;
Long journeys.

It is impossible to take into account all the factors influencing changes in temperature indicators, so measuring basal temperature cannot be considered a 100% reliable method.

It would be more correct to use this technique as an aid along with such diagnostic methods as folliculometry or tests for hormone levels.

Content

The temperature of the human body fluctuates depending on the time of day. The lowest rates are observed in the morning. This morning temperature of the human body is called basal. The readings do not have to be the same during the same hours. It is generally accepted that the average human body temperature is 36.5°C, but in women it is above 37°C for about half of the monthly cycle. The basal temperature decreases slightly before menstruation. By fluctuations in indicators, you can determine the moment of ovulation and the beginning of menstruation.

Can there be a fever before menstruation?

Due to the characteristics of the body, women have an elevated BBT for about 2 weeks. Considering that the most uncomfortable temperature range for a person is 37-37.5°C, it is not surprising that women often have mood swings and poor health. The only consolation is that you can create a graph of basal temperature that correlates with menstruation.

What you need to create a schedule

To identify patterns in each specific case, basal temperature is measured daily for 3 months. BT is measured in the morning, at the same time and no later than 8 am. The duration of sleep before measurement should be at least 5-6 hours. Before the measurement, you cannot exercise any physical activity, even “sit up in bed.”

BBT is always measured with the same thermometer to avoid errors in readings. Digital or special basal thermometers are best suited for this purpose; they are able to record even minor changes in BBT. The measurement duration is at least 5 minutes, but some digital thermometers beep when the measurement is complete.

Measurement methods:

orally;
anally;
vaginally.

Due to the good compression of the anal sphincter, the anal method is considered the best. This method provides the most accurate data. Indications are collected from the first day of the monthly cycle: the next day after the end of bleeding. When menstruation occurs, measurements do not stop.

Normal schedule

At the end of menstruation, BT decreases to the usual average values of about 36.5°C. Deviations of 1-2 tenths of a degree are normal.

From the first day after the end of menstruation they begin to draw up a schedule. Gradually, BTT begins to grow. During the follicular period (from the beginning to the middle) it gradually increases to 36.6-36.9°C.

In the middle of the monthly period, during the ovulation phase, the basal temperature rises to 37-37.4°C. This is the phase of the highest temperatures. The difference in BT between the follicular and ovulation phases is about 0.5°C. The ovulation period lasts approximately 2 weeks ± 2 days, depending on the individual length of the monthly cycle. A rise in temperature just before your period is not normal unless a woman is pregnant.

Can you have a temperature of 37 before your period?

This largely depends on the individual characteristics of the body, but 37 ° C is the lower limit of normal in the ovulation phase before the onset of menstruation. The average basal temperature before menstruation is 37.2°C. Sometimes women cannot understand why before menstruation the temperature rises to 37.5 and remains this way even after menstruation. The answer here is simple: most likely, the woman became pregnant. The second reason for increased BTT may be infectious or inflammatory diseases.

Temperature during menstruation 38

BBT 38° during menstruation is not normal, but it does occur. And such BT is not always bad news. If you have a low-grade fever before your period, it is better to go to the pharmacy for a pregnancy test. If there are 2 strips, you should visit a gynecologist to confirm pregnancy. Sometimes, if there is a hormonal imbalance, a rapid test can show a non-existent pregnancy. If elevated BT persists for a long time, but there is no pregnancy, this is a sign of a disease that requires immediate treatment. You can’t put off visiting a doctor in the hope that it will go away on its own.

Normal basal temperature during menstruation

During menstruation, BT begins to decrease. Normally, on the first day it can be up to 37.4°C. But BTT is influenced not only by the phase of the menstrual period, but also by other conditions:

heat and stuffiness in the room;
general overheating of the body (sleeping with an electric blanket or under a too warm blanket);
possible diseases;
too short, less than 4 hours of sleep before measurement;
alcohol drunk the night before;
ingestion of food or liquid before measuring BBT;
violation of the BT measurement mode;
taking certain medications;
sexual intercourse in the morning before measurement;
diseases that disrupt hormonal balance.

If the bedroom is too hot, your basal temperature may be significantly higher than normal.

What should be the rectal temperature before menstruation?

3 days before menstruation, the basal temperature usually drops to 37°C and remains this way until bleeding begins, after which it begins to decrease. If throughout this period and in the first days of menstruation the basal temperature remains above 37°C, this may indicate pregnancy.

Temperature in the vagina before menstruation

The BT of the human body is the same everywhere, but due to the fact that the thermometer sensor fits differently in different places, the readings differ from each other. When measuring the temperature under the armpit, the readings will be the lowest. In the vagina, the BTT is the same as in the anus, but the measurement readings may be lower. Or be the same. Depends on the sensitivity of the sensor and the tightness of the seal. Vaginal temperature during menstruation can also be lower than anal temperature due to moisture.

Attention! When measuring BT orally, saliva cools the sensor very strongly.

The difference between anal and oral indicators can be 0.5-1°C.

Why does the temperature rise before menstruation?

The menstrual period is divided into:

follicular;
ovulation;
luteal;
period.

The follicular egg matures. To create conditions for egg maturation, the production of estrogen is suppressed at the beginning of the phase. The lack of estrogen leads to an increase in BT during the second ovulation stage.

Important! The lowest BTT rate occurs right in the middle of the monthly cycle: on the last day of the follicular phase.

Body temperature in the second phase of the cycle

The lower temperature limit in the second phase of the cycle is 37°C. Basal temperature rises in the middle of the menstrual cycle. 10 days before your period, the temperature is already stable between 37° and 37.4°C.

Temperature a week before menstruation

If menstruation occurs every 4 weeks, then even on the 23rd day of the cycle the basal temperature remains above 37°. The indicators may decrease slightly if the cycle is shorter than the lunar month or significantly longer. When the period lasts more than 28 days, all phases are somewhat “stretched” in time.

Attention! On the 20th day of the cycle, the basal temperature may drop by one tenth of a degree.

Temperature on the first day of menstruation

Immediately after the start of menstruation, BBT begins to decrease from 37°C and continues to fall until the end of menstruation. In case of pregnancy, the fall does not occur; the BTT indicators continue to remain above 37.5°C.

Temperature and delay of menstruation

BT from 37.5° to 38° in the second (ovulation) phase in combination with a delay in menstruation most likely indicates pregnancy. But we must take into account that increased BT can occur due to diseases of the organs that produce hormones, and hormonal imbalance can cause a delay in menstruation.

How many days before menstruation does basal temperature drop?

Basal temperature in the ovulation phase remains almost constant until bleeding begins. The body “hopes” for pregnancy. Data may fluctuate within 0.1°. If the initial BBT was high, a couple of days before menstruation it may begin to gradually decrease. But the readings drop sharply with the onset of bleeding. The indicators almost immediately return to the average level of 36.5°C.

Deviations in temperature readings in diseases

Although few people have an ideal temperature schedule, each woman has her own “norm”, determined experimentally. Deviations from this norm indicate some kind of disease. Sometimes a consistently elevated, but not very high BBT indicates low-grade inflammation.

Deviations from the schedule in one direction or another may indicate internal pathologies:

n significant reduction in BT on the eve of menstruation and again an increase in readings above 37° indicates endometritis;
increased BT, not changing for 18 days and absence of menstruation at normal times = pregnancy. But it’s better to check with a specialist;
an increase in BT to 37° s in the first half of the cycle indicates inflammation of the appendages. In this case, the increased BT remains in the second phase, without decreasing with the onset of menstruation. During bleeding, BT is also more than 37°C;
slow increase with less than 0.4° difference between the first and second phases serves as a symptom of progesterone deficiency. Insufficiency is also indicated by a decrease in the time of the second phase and an earlier than usual onset of menstruation.

A failure in the temperature chart in itself is not a sign of any disease. Many other factors influence the performance. But if there are regular deviations, you need to visit a doctor.

When to see a doctor

If there are significant or regular deviations from the established schedule, especially in combination with a delay or early arrival of menstruation, a visit to the doctor will be necessary. If the basal temperature in the second phase is above 38°, and severe pain is felt in the lower abdomen, a visit to a medical facility cannot be postponed for long. A medical examination is also necessary when confirming pregnancy.

Conclusion

The basal temperature before menstruation should not normally exceed 38°C. If such a BTT lasts longer than 18 days, you should consult a doctor.

Probably every person has heard about such a “beast” as basal temperature (BT), but not everyone knows what it should be and why it is actually measured. In fact, once you know this mysterious indicator, you can understand what processes take place in the individual’s body.

Often, measuring basal temperature is the prerogative of women. By this indicator, ladies determine ovulation and pregnancy. It is the basal temperature before menstruation that helps the fair half of humanity calculate a favorable day for conception and understand when the egg is ripe.

Therefore, today we will talk about what basal temperature should be before menstruation, as well as during the period of ovulation, we will analyze the main values of this indicator.

What should the BT be?

I would like to start the conversation about this important indicator of women’s health by discussing the temperature measurement procedure itself.

BBT can be measured in the mouth, vagina and rectum. True, most experts believe that the most accurate readings will be if you measure the temperature in the rectum. According to doctors, when receiving readings from the armpit, we cannot cut off the influence of various factors, for example, stress, hypothermia, etc.

It doesn’t matter when the basal temperature is measured: before your period a week or during it. The main thing is that the procedure should be carried out in the morning, immediately after waking up, you cannot get out of bed. You need to immediately take measurements with a regular thermometer.

The normal temperature for a woman who is not ovulating or pregnant is considered to be 36.9 degrees before menstruation. Based on this value, one can judge that the woman is currently not ovulating, or talk about an ovulatory menstrual cycle.

If the basal temperature during menstruation is elevated and its values vary between 37-37.2 degrees, then this may indicate pregnancy; most likely, there will be no more “red days”.

If the temperature before menstruation exceeds 37.5, then this is a reason to contact a gynecologist. This figure may indicate an inflammatory process in the pelvic organs; in this case, consultation with a specialist cannot be avoided.

A high basal rate before menstruation is often caused by a lack of estrogen, which in turn can cause infertility. If you have such symptoms, a visit to an endocrinologist and gynecologist is a must.

On the first day of your period and during it, the basal temperature is usually 37. A decrease in the basal rate below 36.9 before menstruation may also be a reason for thought.

Some doctors believe that low temperatures can make it difficult to conceive a baby.

In addition, a decrease in the basal rate may indicate endometritis, with this disease, on the first day of menstruation, the temperature exceeds 37 degrees. Women who are going to track the dynamics of the basal rate should understand that for this it is necessary to take measurements daily for 3 menstrual periods, this is a minimum.

About the normal indicator before menstruation

For those ladies who decide to analyze their schedule, ideally they should see the following:

2-3 days before menstruation the indicator will be about 36.7;
in 14-20 days, during the progesterone phase, an increase in the indicator will be observed, and at the time of ovulation it will reach 37-37.2 degrees.

If a woman becomes pregnant this month, BT will be increased before "red days". If a woman experiences bleeding, but the basal rate is high, this may indicate a threat of miscarriage.

BT and pregnancy

The processes of conceiving a baby and carrying it to term are directly related to menstruation cycles and, of course, affect all the internal organs and systems of a woman. Therefore, beauties who keep a BT chart will notice characteristic fluctuations on it, which will immediately indicate that the long-awaited fertilization has occurred.

But, of course, in order to determine everything with accuracy, you need to measure BT systematically and draw up a schedule carefully.

Even if you are on your period, do not skip the procedure.

If you did everything correctly, then when pregnancy occurs you will notice the following changes in the schedule:

BT will exceed 37 degrees and will linger there for about 3 days more than in previous months of observations;
If you look closely at the graph, then instead of the usual two waves of BT fluctuations, you will notice a third surge, which indicates pregnancy;
If BT remains high for 3 weeks or more, then this is pregnancy.

That's all. It's time to take stock. So, in order for you to be able to draw some conclusions based on your basal temperature, remember that you need to measure it not for one week, but for at least 3 menstrual cycles.

The collected data will help you draw conclusions about your health, determine the days of ovulation, track inflammatory processes, etc.

Gynecologists have been using it for a long time. Already in the last century, temperature fluctuations on different days of the cycle became known, and later it turned out that sex hormones influence it. Measuring temperature before menstruation is also of great importance. Its indicators can indicate a possible pregnancy, the onset of menstruation, or various gynecological diseases. This method is very relevant in our time. What basal temperature should be before menstruation?

Normal basal temperature before menstruation

On a standard chart for measuring rectal temperature in the luteal phase, it lasts 14-20 days, with the temperature ranging from 36.8-37.5 degrees. At the beginning of menstruation, it always decreases, and this happens about a couple of days before them.

During menstruation, the basal temperature, as a rule, does not rise above 37 degrees, that is, lower than in the second phase. In this case, we can talk about a normal rectal temperature. However, the indicators themselves are not too important; the main thing is to maintain the temperature difference in both phases.

The temperature rises before menstruation - what is it?

If the temperature normally decreases before menstruation, then what could its increase mean? After ovulation, the production of progesterone begins to increase, which has a strong effect on the thermoregulation center in the brain. In this case, some women may feel a slight increase in temperature a week before their period. And after they start, she returns to normal. However, this reaction is not observed in many people.

In addition, the basal temperature before menstruation may rise due to pregnancy. This occurs as a result of hormonal changes. However, you can talk about pregnancy only after a delay, then the woman must do it.

Therefore, by monitoring the temperature, you can find out if you are pregnant. However, it is advisable to measure it rectally. If the rectal temperature rose after ovulation and fell before menstruation, then pregnancy did not occur. If it rises within 37.5 degrees and if there is a delay, it is assumed that conception has occurred.

Basal temperature before menstruation - deviations

The temperature at the beginning of menstruation makes it possible to identify pathological changes, these include:

Inflammation of the uterus (endometritis) is characterized by a slight drop in temperature before the first day of menstruation, while during it it is more than 37 degrees.
Progesterone deficiency, that is, luteal phase deficiency, is characterized by a slow (more than 3 days) rise in temperature values with a difference of less than 0.4 degrees. In addition, the second phase is shortened to 10 days. In this case, menstruation occurs earlier than expected. In addition, the rise in temperature can last less than a week.
An indirect sign may indicate a possible pregnancy - the basal temperature is more than 37 degrees for 14 days, and there is no drop in temperature. In this case, menstruation is delayed. If the temperature persists, but discharge begins, you may suspect a threat of miscarriage.
With inflammation of the appendages, the temperature in the follicular phase rises to 37 degrees in a few days. High rates are also present in the second phase. Before menstruation they do not decrease, and during it the temperature is more than 37 degrees.

Depending on what rectal temperature was maintained before menstruation, it is possible to determine not only the presence of pregnancy, but also some pathological conditions of the genital organs.