Basal temperature during pregnancy: norm

It is believed that measuring the basal body temperature will help you diagnose the onset of pregnancy in its early stages. Elevated basal temperature is a sign of fertilization and conception that occurred. Let's see what it is. [/i]

Basal body temperature is the temperature either in the mouth, in the rectum, or in the vagina. [/b] Indices of basal temperature may indicate the presence of ovulation or its absence. Somewhere up to the middle of the menstrual cycle, the temperature is below 37 degrees, the day before ovulation, there is a fall, that is, a jump down the basal temperature by a couple of tenths of a degree, and just before ovulation, a jump of 0.2-0.4 degrees. If you notice such a temperature jump, then ovulation has taken place. Then the basal temperature is kept almost till the beginning of the next menstrual cycle and only two days before the menstruation or on the 1st day of the monthly it again falls. If the temperature remains elevated, there is a possibility that pregnancy has occurred. [b]

Why is the basal temperature measured?



Indices of basal temperature - this is nothing more than an indicator of the moment of maturation of the egg and its release from the ovarian follicle to meet with the sperm. That is, in other words, it is an indicator of the moment of ovulation. In this sense, the basal temperature measurement is done for different purposes.

  • Someone wants to find out the moment of the greatest probability of getting pregnant.

  • Someone and vice versa do not want to become pregnant, and for them, measuring basal temperature is a contraceptive.

  • In addition, the measurement of basal temperature makes it possible to understand - when the next monthly should come.

  • You can evaluate the work of your endocrine system.

  • On indicators of basal temperature, it is also possible to diagnose the course of the pregnancy that has occurred.


  • Track the basal temperature you need every day for several months.

    Pregnancy and basal temperature



    The rise in temperature occurs under the influence of the hormone progesterone, which begins to be intensively produced during pregnancy. In this case, the increased hormonal background prepares the walls of the uterus for the introduction of a fertilized egg. After the introduction, hormones continue to be produced, hence the increased temperature.

    How to determine the baseline pregnancy with the help of basal temperature? For this you need to know the following:

  • the temperature of 37-373 lasts about 18 days;

  • if there is a third temperature jump in a two-phase graph, however, this is not an uncompromising condition;

  • The fever lasts three days longer than the usual after-ovulation period.


  • If the pregnancy is normal, the basal temperature during pregnancy remains at an elevated level around 37-37.3 for 4 months, then it begins to decrease. After 20 weeks, the sense in the measurement already disappears.

    [i] The question arises - why in general measure the temperature of the whole 4 months?
    And then, that monitoring of temperature indicators will enable to prevent unwanted deviations during pregnancy. If the temperature falls below 37 degrees, this may be a sign of a miscarriage or fading pregnancy. If the temperature rises above 37.8-38 degrees - this is already an indicator of the presence of any inflammatory process in the body of a pregnant woman.

    In any case, if you notice a change in yourself, do not delay the time, go to the doctor.