Many infertility patients feel both happy and worried when they test pregnant after an embryo transfer. Happy that they are finally pregnant, and worried about whether they will be able to deliver this baby successfully and safely. One of the most common problems that people encounter is probably vaginal bleeding after pregnancy. In natural pregnancy, vaginal bleeding is indeed a sign of pre-eclampsia, and pregnant women with bleeding should take timely measures to preserve the pregnancy, but in IVF cycle, vaginal bleeding is actually not that scary, and you should not worry too much about it. Bleeding in early pregnancy after embryo transfer generally has the following possibilities: ① Normal embryo implantation accompanied by a small amount of bleeding; ② Pre-eclampsia caused by unstable embryo implantation; ③ Vaginal bleeding caused by ectopic pregnancy. The first one is the most common, especially for frozen embryo transfer in hormone replacement cycles, where the chances of bleeding are higher. To give you some figures to understand, among 10 pregnant women using vaginal progesterone preparations, 7-8 may have intermittent vaginal bleeding, but only 1 eventually miscarried, so the vast majority of bleeding pregnant women are not at risk of miscarriage, bleeding is just a normal phenomenon accompanied by the embryo in the process of continuous development, stretching to the endothelial lining, there is no need to worry about it at all. In the second case, there are obvious bleeding bands on the ultrasound, and the doctor will inform you of the risk of miscarriage and try to preserve the fetus, which is successful in most cases. The main purpose of the above text is to tell you that there is no inevitable connection between bleeding after embryo transfer and miscarriage, a small amount of vaginal bleeding or intermittent bleeding is normal, as long as you follow the doctor’s instructions and take the medication on time. If the bleeding is continuous and reaches the amount of menstruation, then you should go to the hospital in time.