How does basal temperature change during a cycle. What is the basal temperature before menstruation is normal, why and how to measure, scheduling

Basal temperature is the lowest temperature inside the body, measured after a long rest. Fluctuations in this temperature reflect the processes that occur in the female body. Measurement of BBT indicators and its fluctuation graph helps to find out the day of ovulation in women and use this information to plan or prevent conception.

The accuracy of determining ovulation will depend on the correct measurement. Consider how to measure the temperature.

BBT should be measured without getting out of bed, immediately after sleep. The main condition is not to make any movements, not to raise the body to a vertical position, not to stand up. Any movement activates blood flow and increases the temperature inside the body. It is for this reason that the temperature is higher in the evening.

It is required to determine the minimum temperature, which is formed only due to the work of internal organs. Therefore, it is necessary to measure BT immediately after waking up, before washing and going to the toilet.

The following conditions must be met:

It should be borne in mind that the following factors can affect the temperature indicator:

• lack of sleep;
• diseases of the digestive organs (inflammation of the liver and pancreas, intestinal disorders);
• stress, nervous experiences, mental overload;
• alcohol taken in the evening.

The above factors reduce the effectiveness of the graph, as they violate the rules of measurement.

BBT indicators and measurement technique

The thermometer must be inserted into any open body cavity (anus, vagina, mouth). According to the technique that was developed by Professor Marshal, basal temperature is measured through the anus. This is often done if the temperature needs to be measured in a newborn baby. It is not possible to keep the thermometer under the arm, because it is inserted into the anus.

For women, determining the temperature in the vagina or anus allows you to find out fluctuations in tenths of a degree. It is fractions of degrees that show significant jump in ovulation basal score.

Meaning of measured indicators

The BBT measurement method is designed to determine ovulation. Ovulation is the exit from the shell of the follicle of the egg, which occurs after its maturation. The egg begins to exit the fallopian tube and travel to the uterus. These changes accompany an increase in temperature by tenths of a degree. BBT before ovulation initially decreases slightly, and then increases sharply. Since the release of the egg, conception is possible.

Daily temperature measurement makes it possible to know the day of ovulation. This, in turn, allows you to take appropriate measures to prevent pregnancy or, conversely, to try to get pregnant on these days.

BT chart

The measured indicators are entered into a table and begin to keep a graph. In addition, additional factors should be recorded in the table, affecting measurement accuracy(presence of headache, infection, cold).

The graph looks like a broken line. At the beginning of the monthly indicator is approximately at around 36.9-37.1C (fluctuations of 0.1-0.4C are possible).

After menstruation, the degrees decrease to the lowest levels - 36.6-36.9C. This temperature is required for the maturation of the egg. The ripening period can take up to 2 weeks, so in the next decade the graph will begin to fluctuate around one indicator - from 36.7C, down or up by 0.1-0.3C.

The day before ovulation, the degree decreases (by 0.3-0.5), then sharply increases by 0.4-0.7C and reaches 37C.

temperature during ovulation

BBT during ovulation is a slight decrease before increasing to 37C. By the way, the highest probability of conception on this day is 35%. Therefore, if you are not planning a pregnancy, then you need to limit sexual intercourse or use protection (a condom or other contraception).

After ovulation, basal body temperature is e rise to the upper level ( with slight fluctuations at the top of the graph).

The subsequent schedule will depend on whether the body is preparing for menstruation or pregnancy has occurred. If pregnancy has taken place, then the basal rate will be at a high level. In the female body, progesterone is produced, which maintains a high temperature.

If conception did not occur, then the hormonal background normalizes, the indicator decreases. This is noted a week before menstruation (BT decreases by 0.4-0.7C).

This ovulation BBT schedule is usually found in healthy women. With some violations, the normal broken graphics get lost, the jump becomes not so pronounced. Then the biological method of contraception is ineffective. Pregnancy can occur despite the pronounced absence of a temperature jump.

Diagnosis of diseases by BT

The whole cycle of changes during the month makes it possible to identify the causes of infertility and other disorders. The most common cause of infertility in women is the lack of ovulation. Temperature measurement makes it possible to determine which days of the cycle are easiest to get pregnant and whether the release of the egg begins.

In addition, BT indicates the presence inflammatory process in other organs and systems. This affordable method helps to examine yourself for the identification of hidden diseases completely free of charge, independently and simply.

Days of desired conception and safe sex

Monthly measurements of BBT make it possible to determine a typical graph of temperature changes in the body. According to the schedule, with a high probability it is possible to predict the days when pregnancy is possible and the days when conception is impossible under any circumstances. This data can be used as a warning of pregnancy, or to conceive a child. Consider when conception is possible and how to use this method as a contraceptive.

The days of possible conception are two days immediately after the release of the egg from the follicle. And also 2-3 days before the start of ovulation.

These days, the egg cannot yet be fertilized. However, spermatozoa remain viable for several days. Therefore, getting into the uterus through the vagina, they stay in it for 2-3 days and fertilize the egg immediately when it leaves the follicle. That is, a few days before ovulation can be added to the days of probable conception.

The time of ovulation, as well as the days before it (about 4-6 days) are called fetal. If you are not planning a pregnancy, then it is better to refrain from sex. If you have planned a child, then you need to have sex the day before ovulation. How to find out about the release of the egg, which BT should be measured in the vagina during ovulation?

The day of ovulation according to the schedule is a slight decrease in temperature, and after a few days - a sharp jump up. These two days must be considered fertile (who wants to get pregnant) or "dangerous" (for opponents of conception).

The time after ovulation is called absolute infertility. The life span of an egg after release is one day. And. unfertilized egg after this is destroyed, the possibility of becoming pregnant after ovulation after two days is minimal.

The above division of days into periods of impossible and possible conception is not fair for all women. The protection system will only work if the menstruation is stable. For others, this method is ineffective.

Deviations and the norm

Any changes in the BBT indicator are the result of a hormonal disorder. In a woman's body, all vital processes are determined by hormonal changes. Therefore, pregnancy occurs due to changes in BBT.

During pregnancy, BT is at a high level (more than 37.3C). The presence of increased BBT creates the hormone progesterone, which is intensively formed in the first 4 months of gestation. Therefore, the BT indicator is high at this time. After the amount of progesterone decreases, at the same time B.T. decreases. Therefore, after three weeks of pregnancy, it is pointless to measure its value.

In the first term of pregnancy, BT is the main sign, by which conception is judged even before the delay of menstruation. But this is an ambiguous sign. Preservation of a high level of temperature may accompany the use of certain drugs, exercise, inflammatory diseases. Therefore, a test can definitely tell you about pregnancy. And high BT - indirectly.

Pregnancy definitions with BT

Attention should be focused on two main conditions:

1. BBT is measured at the same time in the morning (a difference of no more than 20 minutes is acceptable).
2. BT is measured without getting out of bed. In order to measure the temperature correctly, the thermometer must be left on a table near the bed, where it can be reached by hand, without turning the torso.

You don't need to take your temperature throughout the day. BT during the day will not be able to show important changes in the body. Only daily measurements in the morning will reflect the real level of hormones.

Graph of the basal temperature of a healthy woman during pregnancy

The BBT chart during pregnancy looks like a broken line, fluctuating in the range of + 37.5C. A decrease in the indicator by less than 36.9C indicates that the progesterone content has decreased in the body. This means the likelihood of a miscarriage, a missed pregnancy, or a threat of a breakdown. A doctor's consultation is required.

But this diagnosis is also ambiguous. Probably, you have heard enough stories about difficult childbirth or overwork has affected. Any experiences, overloads and stresses reduce the BT indicator and lower hormone levels. Try to just bounce back and leave your nerves for later.

The maximum value of BT during pregnancy can reach up to + 38C. If your BBT level is higher, you should consult your doctor. This indicator is often accompanied by inflammation, internal infections.

What should be BT before menstruation? And why is this indicator important? Temperature measurement before and during menstruation makes it possible to determine the presence of an inflammation process in the body. If the temperature during menstruation jumps above 38C, then this means that there is a hidden source of inflammatory disease inside.

1. BT before menstruation - high. During menstruation, the amount of progesterone decreases, therefore, a decrease in the basal rate begins. From higher rates (37.8C on the first day of menstruation), it decreases to 37.1C (by the 4th-5th day of menstruation).
2. BT during menstruation is the average between the elevated temperature of the previous period and the lowered rate after menstruation. During menstruation, BBT remains at a level of approximately 37C or slightly lower.
3. BT after menstruation is the lowest indicator of the cycle (except for the day of ovulation, when the indicator additionally decreases by several degrees).

Why is it necessary to know which BT is before menstruation? Measurements are required for early diagnosing pregnancy. If you have had sexual intercourse without a contraceptive, then you will be able to detect the presence of pregnancy even before the delay in menstruation. Why measure B.T. If the basal rate does not decrease, then it means that there is a pregnancy.

If you follow all the rules for determining the basal temperature, you can discover a lot of new things for yourself. But do not forget that you should not draw certain conclusions yourself, taking into account the obtained graphs. This can only be done by a qualified gynecologist and only after additional examinations.

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Approximate reading time: 8 minutes

When planning a child, expectant mothers are interested in all the nuances of pregnancy and, most importantly, the first signs of its onset. The state of the body of a woman can be indicated by basal temperature (BT), the indicators of which change throughout the menstrual cycle, as well as in the case of a successful conception.

Every modern girl should be able to correctly measure the temperature and build a convenient schedule that allows you to visually track changes in the body before conception, as well as the next 2 weeks after.

You may be interested in: Signs of pregnancy in the first days: the first symptoms and sensations

Basal temperature and features of its measurement

A thermometer, carefully placed by a doctor in the armpit, reliably shows changes in skin temperature, which helps to talk about the presence of inflammatory processes or diseases. However, the temperature indicators inside the body in different organs and areas will differ (therefore, the most accurate measurements are made in the oral cavity).

Basal (rectal) temperature is measured in the rectum of a woman, subject to strict rules. The obtained indicators help to diagnose changes in the hormonal background, as well as determine the favorable period of ovulation. Such measurements are used by patients who are trying to conceive a baby and want to guess the most suitable day for this. The obtained indicators allow you to build a schedule for the coming months and identify which days are favorable for “attempts”. The absence of ovulation according to the schedule is the reason for contacting an endocrinologist or gynecologist.

How to measure basal temperature during pregnancy?

• All measurements are taken on an empty stomach and only after waking up in the morning. To do this, stay in a lying position (you can not get up, go to the toilet, etc.).
• Every day the temperature is measured at the same time (permissible difference is not more than half an hour).
• Around the tip of the thermometer and the anus, lubricate with baby cream or petroleum jelly to facilitate penetration and reduce the risk of damage to the delicate area and mucosa.
• The thermometer should be inserted to a depth of about 20-30 mm.
• Hold the device in the rectum for about 6-7 minutes.
• Immediately after removing the device, take and record the indicators, enter them into the graph.
• Mark on the calendar-schedule factors that could distort the indicators, such as a cold, inflammation, poisoning, endocrine system disorders, etc.

Many patients approach the issue aggressively, taking readings every 2-3 hours during the day. At the same time, the indicators can differ greatly and completely distort the overall picture. The cherished 37.2 ° received in the morning does not at all indicate the onset of pregnancy, since the numbers may fluctuate during the day.

The first half of the cycle (3-4 days after menstruation) is characterized by a reduced BT of 36.5-36.8°. This is thought out by nature for the maturation of a healthy egg. The day before ovulation, the temperature tends to drop sharply. Immediately after this (the second half of the cycle), the indicators rise to 37-37.2 ° and hold until the onset of menstruation. 5-7 days before the next menstruation, the temperature again drops to 36.8-36.9 °.

What should be the basal temperature if there is no pregnancy?

If conception did not occur on the day of ovulation and in the 2nd half of the cycle, then the temperature will decrease. In a pregnant woman, for 18 days, it remains in the range of 37.1-37.2 °. But you should not rely only on temperature measurements and even the absence of menstruation. These phenomena can be caused by severe stress, illness, hormonal imbalances, lifestyle and nutrition. Make an appointment with a gynecologist who will confirm the increase in temperature due to the production of the hormone progesterone, which states a successful conception.

BT in case of pregnancy

The indicators of the graph in the early stages are of diagnostic value and allow you to learn about pathologies before their direct manifestation. The basal temperature during pregnancy during the day may vary slightly within the range of 37.1-37.3 °, but in individual cases, BT up to 38 ° can be considered normal. The female hormone progesterone is responsible for the increase in temperature, the production of which in a pregnant woman increases.

If the expectant mother measured her BT during the quarter and kept a schedule, then she will note that 5-7 days before the next menstruation, the temperature did not decrease (as it should have happened). It remained at the level of 37-37.4°, which with a high probability indicates the onset of pregnancy even before the delay.

If BT increases or decreases sharply, then there is a threat to the course of pregnancy and directly to the fetus.

Too low BBT is often noted with an increased risk of miscarriage or with a frozen pregnancy (the fetus stops developing in the womb). At the same time, the indicators deviate from the norm by 0.7-1 °, so that the “normal” basal temperature of 36.6 ° should be considered pathological in the case of a pregnant woman. But if in the 1st half of the cycle the patient had a reduced level of BT (by 0.4 degrees or more), then the temperature of 36.6-36.8 ° is declared the norm by doctors.

An increase in BBT to 37.4° and above may indicate inflammatory or infectious processes in the pelvic area. Also, high rates are characteristic of an ectopic pregnancy, since progesterone in this case continues to be intensively produced.

Keep in mind that not all patients need to record rectal temperature. Often, doctors advise this to women who have a history of miscarriage or cessation of child development, as well as if the doctor noted the risk of abortion at the appointment. By checking the schedule of bt during pregnancy in the early stages, the doctor can draw conclusions about the course of pregnancy at the beginning of the first trimester and, possibly, send the expectant mother for preservation.

Can you trust your basal temperature?

Unfortunately, this method cannot be considered reliable and reliable, because BT can change for a number of reasons: gynecological, inflammatory, infectious and viral diseases, stress, medication, etc. In addition, a decrease in BBT before a miscarriage or in the case of fetal developmental pathologies does not always indicate threats, so you should not panic before visiting a doctor.

Modern medicine is of the opinion that it is not advisable to keep a schedule for home diagnostics. It can only be useful for identifying suitable days for conception.

Reasons for increasing or decreasing BT

Rates may increase for the following reasons:

• systemic diseases: infectious, viral, colds, bacterial and fungal;
• inflammatory processes in the pelvic organs;
• individual characteristics of the body of the expectant mother, when 38 ° is considered a normal basal temperature;
• incorrect measurement (you walked before the procedure, performed the slightest physical activity).

A low temperature is considered if the indicators do not reach 37 ° (except for individual cases). Often this indicates threats, pathologies and complications. Often, mothers ask what is the basal temperature during a missed pregnancy. As a rule, it should be below 37 ° for several days (provided that you make the right measurements). In the case of serious pathologies or a missed pregnancy, the production of progesterone is inhibited, which is the reason for the low BBT. In such a situation, the patient is immediately hospitalized and procedures are prescribed to save the pregnancy.

Having determined what the basal temperature should be during pregnancy, remember that the reliability of the readings may change under the influence of factors.

• Regular physical activity, sports, weight lifting. If you measure the temperature after stressful situations, the indicator may be higher.
• Psychological stress, emotional experience, problems in the family and at work. Depression and stress, as well as constant thoughts about it, can affect the increase in BBT at the time of measurement.
• Incorrect temperature measurement. Violation of at least one stage of measurement can lead to unpredictable distortion of the result. For example, some women measure BBT in a sitting position, and then rejoice at the “onset of pregnancy”. The high temperature in this case is justified by the fact that the blood actively flows to the area of ​​the pelvic organs. Therefore, it is correct to take indicators in the prone position immediately after sleep.
• The indicators will change if the duration of a woman's sleep changes. If you slept less than 4-5 hours at night, then there is no point in recording the result in a graph.
• Sexual contact less than 12 hours before measurement. Sexual activity (as well as any other physical and psychological activity) on the evening before the measurement day can change the measurement results.
• Snack after waking up. In many expectant mothers, toxicosis is quite acute, for which doctors recommend eating immediately after getting up. However, eat after measuring the rectal temperature, otherwise the results cannot be considered reliable.
• Taking medication. Some drugs can affect the result, increasing or decreasing it. Finish the course of therapy and only after that start maintaining the schedule.
• Diseases (including gynecological). If you are aware of a mild cold or infection, then it is not advisable to take measurements on these days.

During the first visit to the gynecologist, you will find out what the basal temperature should be in early pregnancy. However, BT scheduling and monitoring is only appropriate during the first 2 weeks of the first trimester. After

Basal temperature is a parameter by which control over the work of the ovaries is exercised. This is an old, and most importantly, proven and reliable method. Basal temperature is based on the hyperthermic effect of progesterone on the hypothalamus.

After the process of ovulation, the level of progesterone rises. If a woman does not become pregnant in this cycle, then the level of progesterone slowly drops to the initial levels by the beginning of menstruation, and with the advent of pregnancy, the level of progesterone continues to increase.

It has been established that the most accurate cyclic frequency of the body's temperature regime during the period of progesterone action is reproduced under the condition that the procedure is carried out in the rectum. A woman can get the correct temperature value by measuring it in the morning without getting out of bed. This process takes 5 to 8 minutes daily. A one-time measurement of the basal temperature of women is meaningless, since this must be done systematically.

If conception has occurred and the expectant mother has no problems with the course of the menstrual cycle, the indicators in the second cycle rise above 37 ° C, this is considered the norm, and not a manifestation of malaise.

If the rectal temperature during a delay in menstruation is less than 37 ° C, this is considered an alarming sign, probably indicating malfunction of the ovaries, which is displayed in the absence of the ovulation process and the formation of a follicular cyst.

Measurement of rectal temperature in the beautiful half does not give a 100% result, in principle, like any other method. Therefore, relying only on the results of this technique, it is not recommended to diagnose the correctness of the work of your body. It is better to use other, more modern methods that a gynecologist can offer.

We measure basal temperature correctly

Some representatives of the fair sex, showing concern for the future baby, repeatedly measure rectal temperature during the day, constantly getting different results. And the more the temperature is measured, the lower it gets. I would like to reassure all expectant mothers: this is not a pathology, but a completely natural process. Indicative is the very first result obtained in the morning.

For a woman, it is important not only to measure body temperature rectally, but to do it correctly. The process of measuring basal temperature should be as follows:

• Before going to bed, prepare a thermometer by placing it so that in the morning, without getting out of bed, you can get it;
• waking up, without getting out of bed and without making unnecessary movements, you should take a thermometer and smear its tip with cream (preferably for children);
• then you should insert a thermometer into the anus 2–3 cm deep;
• hold the thermometer for 5-8 minutes;

If a woman follows all of the above recommendations, only in this case the result can be considered reliable. If, before measuring the basal temperature, the woman got out of bed, then this information will not have any diagnostic value.

Factors that have an impact on the basal temperature of women:

1. Physical exercise. And here we mean not charging and walking. When measuring basal temperature, it is strongly recommended to refrain from any movements, up to coups in bed. Waking up, a woman should choose the most favorable position and not change until the end of the procedure for measuring basal temperature.
2. Only the horizontal position of the body. In the process of measuring basal temperature, the body should not be in an upright position because blood circulation increases, which leads to an intense rush of blood to the organs located in the hip part of the body, and this situation can drastically affect the reliability of the results.
3. Sleep continuity. If a woman slept less than 3-4 hours in a row, talking about measuring basal temperature is simply meaningless.
4. having sex. If a gynecologist has recommended that a pregnant woman monitor her rectal temperature, then she should refrain from having sex for a while. If it is impossible to overcome the desire to have sex, the interval between intercourse and measurement of basal temperature should be at least 12 hours.
5. food culture. Even if the expectant mother is tormented by toxicosis, and this is quite a common occurrence during pregnancy, you should not eat before measuring the rectal temperature. Only after receiving the result, you can refresh yourself.
6. Taking medications. Any medications can affect fluctuations in basal temperature in women.
7. SARS (acute viral infections). If you feel unwell, you should not hope for the correctness of the results of measuring body temperature by the rectal method. If you have a cold, your basal temperature measurements will not be accurate.

Basal temperature and pregnancy

Many representatives of the weaker sex believe that with the onset of pregnancy, rectal temperature measurements are no longer necessary, but this is not so. It is worth noting that basal temperature is one of the most reliable indicators of the course of pregnancy, thanks to which deviations from the norm can be detected in the early stages.

The norms of basal temperature before the delay at the beginning of pregnancy

Expectant mothers often ask the question: what is the basal temperature considered normal at the beginning of pregnancy before the delay in menstruation? Normal rectal temperature in the second phase of menstruation is 37–37.3°. If this indicator does not change within eighteen days, pregnancy has probably occurred. A decrease in basal temperature during a period of persistent increase for one day is acceptable. The phenomenon is called "implantation retraction" - this is the day the fertilized egg is attached to the uterine wall, when estrogen is injected and the basal temperature drops.

If during the 3-week period the basal temperature remains at the same level, the option of an early addition to the family is not ruled out. Even if critical days have come, it is recommended to do a test and visit a antenatal clinic.

What basal temperature is considered normal during pregnancy?

As soon as the indicators of basal (rectal) temperature begin to fluctuate, it is worth thinking about the state of health, since these changes can be a signal notifying you of the presence of various kinds of pathologies in the body. Such changes in basal temperature during pregnancy may indicate a threatened miscarriage. The established average statistical indicator of basal temperature varies from 37.1 ° C to 37.3 ° C. But this is an average value. The basal temperature directly depends on the characteristics of the female body and can often rise to 38 ° C.

Once again, it is worth recalling that the average basal temperature ranges from 37.1° C to 37.3° C, but can often jump to 38° C. This value is normal and should not cause concern. If the basal temperature in a pregnant woman rises above 38 ° C, this should be alarming. A sharp increase in basal temperature may be an indicator that the inflammatory process has “activated” in the body.

Instead of a conclusion: in pregnant women, rectal temperature gives a reliable result only in the first 14 weeks. After this period, the hormonal background of the future mother is going through its last "transformations" and temperature measurements will not say anything else. If pregnancy has not occurred, the basal temperature changes, depending on the phase of the menstrual cycle.

What can a basal temperature of 37 degrees indicate? Before talking in more detail about elevated temperature, we recommend that you first read the material, which details the basal body temperature, what it is, how it can be measured, and its average values ​​on different days of the monthly cycle.

The menstrual cycle has two stages, with ovulation in between. The first stage is characterized by lower temperatures, and after ovulation, the temperature rises, as the progesterone hormone increases, and lingers at around 37 degrees and a little more. If conception does not take place, the temperature slowly decreases by the onset of menstruation. The next monthly cycle follows the same pattern.

If conception has taken place, then you will not immediately see a decrease in BBT on the basal temperature curve. It will decrease progressively, and will be kept at the same level until the very birth and subsequent menstruation.

What can a basal temperature of 37 degrees or more mean?

The basal temperature of 37 degrees fits into the norm of the monthly cycle schedule. It is important that this increase in temperature occurs in the second half of the cycle and does not exceed 37.5.

If you notice that the first part of the monthly cycle was characterized by a lower temperature, and then after two weeks it rose to 37 or 37.5, this is the norm. Such an increase does not indicate any inflammatory disease and is absolutely normal.

1. If the basal temperature is above 37 and lasts the entire menstrual cycle, then this may indicate violations in the female reproductive function. Most likely, this is due to pathological changes in the hormonal balance, namely, a lack of estrogen or an increase in the amount of prolactin in the blood. The excess towards the hormone progesterone causes an increase in basal temperature during the entire monthly cycle.

These changes are clearly visible and detected using the plotted basal temperature graph.
2. Pregnancy is another cause of elevated basal temperature. A high level of BT in the temperature chart remains for a long time. This increase is due to the increased content of progesterone, which is of great importance in preparing the female body for bearing a baby and future childbirth.

Thanks to the built schedule of BT, pregnancy is detected in the early stages. You can determine it even before a delay in menstruation is noticed, if on the chart on certain days of the cycle the temperature does not begin to drop and stays within 37-37.2 degrees.

So, how can you find out if you're pregnant without the help of a test?

• If the temperature exceeds 37, it is observed for longer than three days (meaning, after ovulation before menstruation). So, if usually on the BT chart it was 13 days, and now it is 17, then most likely it can be argued that there is a pregnancy. If the cycle is irregular, the first phase can last for various periods of time, and the corpus luteum phase is usually stable, and it is necessary to determine changes in the temperature graph from it, it will be more informative.


• The basal temperature graph normally consists of two phases - lower temperatures, ovulation, and then the second phase with a sharp increase in temperature - this is the corpus luteum phase. If pregnancy occurs, there may be another jump in the graph (after the second phase), and the graph takes on a three-phase appearance.


• If you observe an increase in temperature on the basal temperature chart for more than 18 days, then this indicates the onset of pregnancy.

A healthy woman resorts to measurements most often because of the desire to conceive a child. BT during pregnancy is significantly different from the indications that are observed in other periods of life. If there are corresponding indications of BT, which are inherent in pregnancy, then we can talk about a successful conception. BBT also becomes interesting in each period of gestation - from 1 to 40 weeks.

Basal temperature data is taken from three places:

1. In the mouth.
2. In the rectum (rectal).
3. Into the vagina.

The most accurate readings are the temperatures measured in the rectum. They are lowered in the first phase, that is, up to 37°C. They fluctuate from 36.2 to 36.9 degrees, which is individual. The most important thing is that the BBT readings in the second phase (the release of the egg into the fallopian tubes, that is, after ovulation) should be at least 0.4 ° C higher than the previous ones. This "morning" temperature persists until the onset of menstruation:

• For 1-2 days before menstruation, BT falls.
• On the day of menstruation increases.

Basal temperature is strictly controlled by the level of hormones produced by the body. During pregnancy in the second phase, the temperature gradually rises or is already high up to a delay in menstruation and even more. This indicates a high level of progesterone and estrogen, which regulate the process of maintaining a pregnancy.

According to the basal temperature, you can calculate the days favorable for conception, as well as periods when you can not worry about the safety of sex. It is also regulated by hormone levels. Basal temperature also helps to identify various deviations in reproductive function. For example, at 3 and 4 weeks of pregnancy (according to obstetric indications), the temperature should be more than 37 ° C.

If there is a delay, but the basal rate falls, then this indicates a negative process of conception (pregnancy is not observed).

How to measure?

Basal temperature is an easily changing thing. A woman must follow the rules of her measurement in order to get the correct data. These rules are the same for all women: both pregnant and non-pregnant..

One thermometer should be used, which can be mercury (preferably) or digital. It is inserted into the rectum by 2-3 cm and held for 5-7 minutes. Measurements are taken strictly at the same time (the run-up can be up to 30-60 minutes maximum). Everything happens in the morning, when the woman has just woken up and has not yet got out of bed.

Other rules for scheduling BT are:

• Measurements are taken for 4 menstrual cycles in a row for a more reliable picture.
• Measurements are taken after waking up from sleep, which should last at least 5 hours. In the morning, a woman should, without getting out of bed and without stretching, take a thermometer and measure the temperature.
• While the temperature is being measured, you should lie still.
• All data is recorded in a notebook, where the date and exact data on BT are indicated. At the same time, notes are recorded regarding what distorted the BT readings, for example, the use of alcohol or drugs the day before.

Basal body temperature is not taken during the daytime. Only in the morning is it reliable. With activity and movement, body temperature rises, which distorts the readings.

BT distortion can be affected by:

1. Alcohol consumption.
2. Sexual contact the day before.
3. Diseases in which the general body temperature rises.

During pregnancy, it should be borne in mind that BBT is within the normal range for 2 weeks after conception. Then there are hormonal changes that distort the data. At week 9, BT will not be of much interest than at week 1 or 2. However, if the doctor has prescribed it to be measured, then his recommendations should be followed.

Diagnosis at an early stage

During pregnancy, BBT remains high until the delay and longer. Diagnosis in the early stages is made after conception in the first weeks. The temperature rises to 37 and above (by 0.4-0.5 degrees) and on the day of the delay it will rise by another 0.2-0.3. However, everything is individual: in some women, the temperature may not rise more than 37 ° C.

The BT schedule during the first week will sometimes behave strangely. For example, on the 6th day, the basal temperature may drop, which does not indicate pathologies. Sometimes this happens after ovulation on the 7-10th day, which indicates implantation retraction, which may be accompanied by bleeding.

The next or 2 days after the fall, the temperature rises again to a high level. Such fluctuations in the second phase may indicate fertilization.

Other signs of an onset pregnancy may be the following cases (if there was no short-term jump in temperature in the second phase):

• Increased BBT is observed for 3 days and longer than in previous cycles.
• High BBT lasts at least 18 days - a sure indicator of pregnancy.
• A third upward temperature jump is observed, dividing the graph into 3 phases.

Low BBT during gestation

You should pay attention to what is the basal temperature when pregnancy occurs. Its normal indicator is 37.1-37.4 ° C. However, sometimes lower temperatures can be observed. Low BBT is not an alarming sign during the gestation period, but attention should be paid to it.

Often, gynecologists advise measuring BBT during the entire first trimester. This occurs in cases where a woman has previously had miscarriages, the threat of termination or fading of pregnancy. A low temperature in the first trimester may indicate:

• Lack of progesterone, which regulates normal gestation.
• The threat of spontaneous abortion.
• Freezing fetus.

A sharp drop in the basal mark below 37 degrees may indicate insufficient production of progesterone. In this case, a visit to the doctor should be mandatory, especially if other warning signs occur:

1. Pain in the lower abdomen.
2. Increased uterine tone.
3. Bleeding.

You should not panic that BBT has dropped to 36.9 ° C, if there are no discomfort, abdominal pain, or bleeding. This is not considered normal, but the individual characteristics of the female body may play a role here. You should be examined by a doctor so as not to worry about low BBT.

If BBT drops to 36°C, this is an abnormal sign. Fetal fading or spontaneous abortion may be noted here. In any case, it is necessary to consult a doctor urgently.

It is also necessary to make a visit to the gynecologist if BT drops to 36.8 degrees or below and lasts for a long time. Here you may need to get tests for hormone levels. However, if low BBT manifested itself only once, then you should not worry. It could be an error in measurements or a temporary change in the state of the female body.

What does elevated BBT mean?

High BT should also draw attention. What does her high performance mean? If 38 ° C is noted for a long time, then medical help should be used, since we can talk about inflammatory processes in the body or an ectopic pregnancy (BT can be normal in this case).

Slightly elevated BBT (37.7-38°C) is normal, which may indicate the individual characteristics of the organism.

We should not forget about the various factors that affect BBT measurements. If a woman takes medication, has sex, moves after waking up, then the indicators will be different, which is natural.

A slightly increased BBT is quite normal, if at the same time the woman feels good and nothing bothers her, and the level of hormones remains normal.

Internal BT at various stages of pregnancy

Changes in internal BBT at various stages of pregnancy should be considered:

• The 3rd week corresponds to the 1st embryonic week. At this stage, BT shows 37-37.5-37.7 degrees and a little higher. A mark below 37 ° C indicates deviations and the threat of termination of pregnancy.
• The 4th week is marked by BT indicators in the range of 37.1-37.3 ° C, the maximum limit is 38 ° C. Higher values ​​indicate infectious or inflammatory processes.
• The 5th week should be stable within 37.1-37.7 degrees. If it repeatedly rises or falls, then you should pay attention to other signs: pulling pains, hardening of the abdomen, softening of the mammary glands, etc.
• The 6th week retains the same indicators: 37.1-37.7°C. If the temperature rises or falls significantly, then we can talk about the death of the fetus.
• Weeks 7-8 are marked by BBT values ​​within the range not lower than 37.1-37.3 and not higher than 38 degrees. In case of abnormal indicators, additional health diagnostics (ultrasound) should be performed. By the end of this period, the fetus becomes less susceptible to various factors, but it is better to continue to schedule BT.
• 9-10 weeks should keep the previous indicators in the range of more than 37 and below 38 degrees. Otherwise, medical advice is recommended.
• The 11th week is marked by a slight decrease in BBT to 37-37.2°C. If the temperature remains high, then you should consult a gynecologist.
• The 12th week is determined by BT marks of 37-37.8, with a maximum of 38 degrees. Ideal indicators are 37.6-37.7 ° C.

In the following weeks, the level of BT remains within the normal range - in the region of 36.6-36.8 degrees. Too high or too low BT indicate hormonal disorders, the threat of miscarriage and other pathologies. At the 40th week, BBT rises to 37.4 degrees or more (by 0.5-0.8 ° C). Before giving birth, some women also have a high fever.

Forecast

Basal temperature helps in solving many problems, including during the entire pregnancy. It's not enough just to conceive, you also have to endure, which is 40 long weeks. A lot can happen during this period. In order for the prognosis to be favorable, it is necessary to measure BBT throughout the pregnancy in order to note deviations from the norm and seek help in time.