Normally, women do not have menstruation during pregnancy, so if vaginal bleeding occurs during pregnancy, it may be physiological, but it is also necessary to be alert to abnormal pregnancies such as pre-eclampsia and ectopic pregnancy. Patients need to go to the hospital in time for examination and take symptomatic treatment according to the cause. Common causes and treatments: I. Physiological bleeding Some people may experience implantation bleeding during the first 3 months of pregnancy due to the implantation of the fertilized egg, which usually stops bleeding in the middle of pregnancy. Generally, no special treatment is needed, but attention should be paid to rest and avoid stimulation by sexual intercourse or excessive exercise. Second, pathological bleeding 1. Pre-eclampsia: If the gestational sac slightly strips the uterine wall, it will lead to bloody discharge, which can be manifested as pinkish leucorrhea. Patients need to rest properly, reduce the amount of activity, and supplement more iron-rich foods such as animal offal, and can use progesterone, progesterone and other hormones for fetal preservation treatment under the guidance of a doctor; 2, embryonic abortion: the fetus stops developing and then abrupts from the uterine wall, there will be vaginal bleeding, the ultrasound examination shows no fetal buds or fetal buds in the gestational sac, the fetus has an irregular shape, and there is no fetal heartbeat, once the diagnosis must be done to clear the uterus; 3 The abnormal position of placenta: such as placenta praevia and placenta praevia can cause vaginal bleeding, which requires conservative treatment or termination of pregnancy according to the development of embryo. Note: You should maintain a good psychological state during pregnancy and avoid anxiety as much as possible to prevent aggravating the discomfort. If you have any problems, you should consult a doctor promptly.