The basal temperature during pregnancy is early. Basal temperature schedule during pregnancy

Do not know how to measure the basal temperature during pregnancy and make a graph correctly? In this article you will learn how to do this, as well as how to decipher the schedule you get.

The basal temperature is measured rectally after a long period of rest or sleep. This is the lowest temperature of the human body.

According to the basic temperature (BT) values, a graph is built, based on which some conclusions can be drawn about the work of a woman’s reproductive function, in particular, many use this method to determine the onset of ovulation or determining a possible pregnancy.

How is the basal temperature measured during pregnancy?

Usually we measure body temperature in the axillary cavity with an ordinary thermometer, but the measurement of the basal temperature and its values \u200b\u200bdiffer.

• Firstly, the measurement of the basal temperature is carried out rectally, i.e. In the rectum
• Secondly, measurements need to be carried out at the same time, with a difference of no more than 30 minutes
• Thirdly, the temperature is measured in the morning, before that you must sleep continuously at least 4-6 hours
• Fourth, the measurements are taken before you got out of bed, you can’t sit down before, but it’s better not to move, just extend your hand behind a thermometer, which should be put as close as possible in the evening (at an extended arm, no further)

Important: do not change the thermometer throughout the time measurement of the basal temperature.

Measurements are carried out, as in the case of measuring body temperature, 5-7 minutes. Record the armometer readings.

Based on the temperature values, a graph of the dependence of the BT on the day of the cycle is built. If there were any deviations on the day of the measurement, for example, you measured the temperature at another time, got into the toilet or to the child at night, you are sick with something-be sure to enter the notes in your records and graphics.

To draw any conclusions about determining the day of ovulation, it is necessary to measure at least 3 months in a row.

Basal temperature schedule when planning pregnancy

• You can build a schedule yourself, or you can use special programs to build graphs or special resources on the Internet
• It will be enough for you to enter the thermometer in the table, and you will receive a graph with the designation of the ovulation day, and you will also see how your cycle is divided into follicular and lutein phases

If a woman has ovulation, then the graph will look approximately as follows:

The first phase shows that the basal temperature is below 37 ° C, a drop in temperature is observed before ovulation, in the second phase of the BT cycle it grows at least 0.4 ° C from the average temperature of the first phase and is kept at this level for 12-14 days. Before menstruation, the temperature also drops slightly, as well as before ovulation.

Ovulation occurs per day, before a sharp increase in BT, on the graph is indicated by the vertical line approximately in the middle of the cycle.

Even in healthy women who do not have problems with reproductive function, there are anovulatory cycles about twice a year, i.e. Cycles in which ovulation does not occur. The BT graph in this case looks like this:

In the anovulatory cycle, the temperature does not increase, because The yellow body is not formed, which affects it. Therefore, in such a graph there is neither a sharp drop in temperature or rise, respectively, there is no lines of ovulation and separation of the cycle into phases.

If you observe several such cycles in a row, consult a doctor and go through the examination, because This indicates disorders of the childbearing function.

If a woman has problems with the production of estrogens, then this can also be determined by the schedule of BT. He will look like this:

With an insufficient amount of estrogen produced, the temperature values \u200b\u200bin the first phase will be about 37 ° C, while with their normal content, the BT should not exceed 36.2-36.5 ° C.

If the body does not have enough estrogen and progesterones, then on the graph this can be seen as follows:

As you can see, the temperature in the first phase and in the second does not exceed 37 ° C. In addition, the difference between the first and second phase is only 0.2-0.3 ° C.

Important: it is impossible to make a diagnosis only according to the schedule of basal temperature, for this you need to undergo the necessary examinations and take tests.

The BT schedule can only make the woman think about the fact that something may not be so, supplement the existing picture or confirm the diagnosis made by the doctor.

What should be the basal temperature during pregnancy before the delay?

• Before the delay of menstruation, the woman is in the lutein phase of the cycle. As can be seen from the graphs above, the temperature of this phase is slightly increased in relation to the first phase
• In case of pregnancy, the temperature will stay more than 37 ° C and the temperature drop will not be observed before the start of menstruation
• Those. If more than 2 weeks passed after ovulation, and the line of the schedule does not go down, it makes sense to think about the fact that you may be pregnant
• And if 18 days have already passed, and BT is above 37 ° C, then the probability of pregnancy is very high. Make a test, although at this time it may not work yet
• A more reliable method is a blood test for hCG, it is a hormone, which speaks of the onset of pregnancy
• It can be taken already 7-10 days after ovulation, because At this time, the implantation of a fertilized egg into the wall of the uterus occurs and the body begins to produce a hormone of pregnancy
• It also happens that the temperature is below 37 ° C, but the pregnancy has occurred. In this case, the body is possible not enough progesterone, which is responsible for the safety of pregnancy and reliable implantation of the egg
• In this case, it is better to visit a doctor and donate blood for analysis to determine the level of hormone, you may have to take drugs containing synthesized progesterone (Utratzhtar or Duphaston) to preserve pregnancy

Basal temperature schedule during pregnancy

The BT schedule during pregnancy has no two phases, but three, and looks something like this:

Let's look at the schedule in more detail.

1. The first phase. The first 5 days is menstruation, the temperature drops below 37 ° C. We draw a line by peaks - this is the temperature of the first phase
2. On the 14th day, ovulation occurs, because Further, the basal temperature grows by 0.3 ° C, followed by continuation of growth
3. In the second phase, the temperature is set approximately 0.5 ° C higher than in the first
4. On the 7th day after ovulation, the so -called “implantation setting” occurs - a sharp decrease in temperature by an average of 0.3 ° C. On this day, the egg began to implant into the wall of the uterus
5. In the third phase, there is still a slight increase in temperature to 37-37.2 ° C and it lasts at this level the first two weeks of pregnancy, then the BT measurements are not informative due to changes in the hormonal background

Normal basal temperature during pregnancy

• During pregnancy, the basal temperature should not fall more than 0.2 ° C and stay at the level of 37-37.3 ° C and above
• If the temperature begins to fluctuate and then fall, then grow, rather run to the doctor
• Such fluctuations may indicate a lack of necessary hormones, other possible violations or the onset of miscarriage
• In some cases, the temperature can reach 38 ° C, and this can also be normal

What should be the basal temperature in the early stages of pregnancy?

The first two weeks of pregnancy, the basal temperature approximately ranges between 37 ° C and 37.3 ° C. It is according to BT values \u200b\u200bthat you can determine the probable onset of pregnancy before the test.

However, the BT graph is a very unreliable method of diagnosing and determining pregnancy, because An increase in temperature can be provoked by other factors:

• the presence of inflammatory diseases
• improper temperature measurement
• if there are any gynecology problems
• there were strong physical activity the day before
• was sexual intercourse in less than 4 hours before measurement
• there are infectious diseases
• a woman takes any medications that can affect BT

Why has the basal temperature decreased during pregnancy?

• Doctors advise not to measure the basal temperature during pregnancy, not everyone, but only to those women who already had problems with bearing a child: there were miscarriages or frozen pregnancies
• Drawing up a schedule of BT in this case will help to notice any deviations or violations in time and timely react to them with the corresponding treatment
• In this case, a decrease in BT during pregnancy below 37 ° C will talk about a lack of progesterone and a possible miscarriage or stopping the development of the fetus
• If you notice this in time, it is possible to prescribe your pregnancy with progesterone. Therefore, doctors ask their patients to take measurements if they had previously had problems with bearing

High basal temperature during pregnancy?

The permissible value of increasing BT during pregnancy is 38 ° C. If you measured more, go to the doctor. Perhaps in your body there are inflammatory processes that can harm the fetus in such a small date.

The doctor will prescribe additional examinations and tests, perhaps you just incorrectly measured the temperature, so you should not worry in advance, and even more so do not make yourself diagnoses yourself. Trust your doctor.

Basal temperature with frozen pregnancy

BT with frozen pregnancy decreases below 37 ° C. This is due to the fact that when the fetus does not develop, the yellow body stops its work, including the development of progesterone.

But this does not always happen, sometimes the temperature remains at the same level, so it is impossible to judge only by the BT schedule.

Basal temperature during an ectopic pregnancy

If the pregnancy is an ectopic, the yellow body still works and fully performs its functions, which means that it produces progesterone and the basal temperature graph looks the same as in uterine pregnancy.

In an ectopic pregnancy, the basal temperature rises in the second phase, so the measurement of BT in this case is not informative and other diagnostic methods should be used.

We want to pay your attention again to the fact that the measurement of basal temperature and compiling a schedule is not a reliable diagnostic method, the BT graph only complements the overall picture, confirms suspicions, and helps in time to respond to possible deviations in reproductive function.

To determine the day of ovulation, there are more reliable ways, for example, ovulation or follicolateus tests, and to determine pregnancy, pregnancy tests and blood test for hCG.

VIDEO: Reproduction, measurement of the basal temperature