Women will not have menstruation after pregnancy. The phenomenon of bleeding after pregnancy is actually not a real menstruation, which is caused by many factors such as bleeding from cervical erosion, ectopic pregnancy, preeclampsia, and stimulation of the fertilized egg’s implantation, and so on, and so it is not normal for women to have menstruation after pregnancy. A woman’s menstruation is the process of shedding of the uterine lining, and after pregnancy as the fertilized egg will lay, develop and grow on top of the uterine lining, so the uterine lining will not shed again, so there will be no menstruation. Vaginal bleeding after pregnancy may also be implantation bleeding that occurs after the fertilized egg is deposited, which is a physiological phenomenon. However, the bleeding will not be very long, the amount is very small in drips, and does not require the use of sanitary napkins, and the bleeding lasts for about 2-3 days. If the woman herself has gynecological diseases, such as cervical erosion is more serious, after pregnancy due to the stimulation of progesterone will lead to the erosion of the area of the phenomenon of bleeding. Ectopic pregnancy can also cause vaginal bleeding, which is accompanied by abdominal pain and bright red in color. In addition, preeclampsia can also lead to vaginal bleeding after pregnancy. Therefore, women who have vaginal bleeding after pregnancy are not really menstruating, but need to go to the hospital to do the relevant aspects of the examination, to identify the specific causes of the disease, and then symptomatic treatment.