By measuring the basal temperature, women usually determine the onset of ovulation. When the temperature inside the genital organs rises slightly above normal, the egg is ready for fertilization. But with the help of basal temperature, the onset of conception can also be determined. To do this, during a delay in menstruation, a thermometer is placed in the anus, since the temperature in the rectum and genital tract is the same. It is better to carry out the procedure after a night's sleep, without getting out of bed.
If a woman maintains a basal temperature chart for 3-4 months, then in the event of pregnancy, she will notice that a week before the start of menstruation, the basal temperature, instead of decreasing, continues to remain at 37 degrees. In this case, you can most likely assume that you are pregnant.