Measurement of basal temperature during pregnancy

From the beginning of menstruation, the woman begins to measure the morning temperature after sleep. It is measured most often under the tongue, and approximately 12 days the basal temperature will be about 36.5 degrees. Then a slight drop in basal temperature for one day is possible, and with the onset of ovulation the graph changes: then the basal temperature rises by 0.4 degrees or more - from 37 degrees (and maybe 37-38, for different women, in different ways). This occurs before menstruation, before which there is a second decrease in basal temperature.

Change in basal temperature during pregnancy

When a woman has fertilized an egg, the basal temperature does not decrease with a monthly delay, she is above 37 degrees, only menstruation is not. Sometimes, when embryo is implanted, the basal temperature even makes a sharp jump upward (37-38 degrees). All of its changes can be informative up to 20 weeks of pregnancy, then it is usually not measured.

Basal temperature during pregnancy

Not always the basal temperature immediately jumps during pregnancy, but only it does not fall, and the monthly does not begin. After conception, usually increases the basal temperature during pregnancy, which lasts more than 18 days (ranging from 37.1 to 37.3 degrees).

If the increase in basal temperature during pregnancy is a variant of the norm, then its reduction is a very poor prognostic sign. A decrease in basal temperature in a diagnosed pregnancy may indicate a non-developing pregnancy and death of the embryo. But the basal temperature is informative only in the case of early pregnancy (up to 20 weeks), since then it starts to decrease again. After 21 weeks of gestation, the basal temperature is normally below 37 degrees, and now this is not at all a sign of a threat of miscarriage.

Decreased basal temperature during pregnancy

If, after the onset of pregnancy, basal temperature decreases slightly, this may indicate a decrease in the level of progesterone and the threat of miscarriage. But if the basal temperature falls by 0.8-1 degrees and remains at this level, then this is a sign of a frozen pregnancy and you should immediately undergo an ultrasound examination (check whether a fetal egg and embryo is growing, whether there is palpitation or fetal movements). A basal temperature when taking Dufaston or Utrozhestan can stay for a while high and with undeveloped pregnancy.