Pregnant women don’t get their period. After pregnancy, the ovaries will secrete large amounts of progesterone and estrogen to promote the thickening of the uterine lining, thus providing a fertile “soil” for the fertilized egg to settle and grow. At this time, as the level of progesterone in the female body continues to increase, the lining of the uterus will no longer fall off, and the woman will not come back to menstruation. However, a few women still experience a small amount of vaginal bleeding during the first 3 months of their original menstrual cycle. Menstruation after pregnancy is not really menstruation, it is bleeding due to a lesion in the uterus or its adnexa, and you should be especially alert to ectopic pregnancy and preeclamptic miscarriage If you get pregnant and then have your period, you should go to the hospital for an examination immediately. Identify the cause of the bleeding so that it can be treated promptly.