There are the following differences between the clinical symptoms of pregnancy and menstruation: first, the peak state of basal body temperature after pregnancy usually lasts more than 15 days, while the basal body temperature will drop 24 hours before menstruation. This high temperature state lasts 12-14 days clinically, usually not more than 15 days, which is the first difference. Secondly, there will be an increase in vaginal secretions before the onset of menstruation, mainly because of the vigorous secretion of endometrial glands before menstruation, so it will lead to an increase in vaginal secretions. And just pregnant due to the body’s estrogen increase is relatively not so fast, so this time the vaginal secretions often do not appear to increase, just through a period of time after pregnancy, with the body’s estrogen increase secretions will increase.