Often, post-transfer patients are very nervous after the appearance of coffee-colored secretion or small amount of bleeding. Today we will analyze the causes of bleeding after transfer: First of all, we remind you that some women may experience vaginal bleeding after embryo transfer, before 12 weeks of pregnancy, if the bleeding is small, there is no need to worry and can be observed temporarily, but if the bleeding is more than that or increases, you should consult a doctor in time. Each month a woman’s physiological period comes to prepare for the birth of a baby. The ovaries discharge eggs and cause the endometrium to thicken and shed to form menstruation. During pregnancy, there will be no menstrual flow, so any bleeding during the period from confirmation of pregnancy to delivery is usually an abnormal condition and should be diagnosed by a doctor. Early Pregnancy: Patients usually ask, “Doctor, if there is bleeding in the first trimester of pregnancy, is the baby not there?” Experts say that some pregnant women who are easily nervous learn that the embryo is still unstable in the first trimester of pregnancy and are worried about the wind blowing. In fact, bleeding in the early stage does not necessarily mean that the baby will be aborted, and must be judged depending on whether the embryo is successfully laid. The most common reason for bleeding in early pregnancy is that the hormones in the pregnant mother’s body are changing and the supply of luteinizing hormone is insufficient. The experts pointed out that luteinizing hormone is a very important hormone in early pregnancy, initially provided by the ovaries, until after 9 weeks of pregnancy, the placenta will take on this task to provide stable and sufficient luteinizing hormone, so in the early embryonic stage, the ovarian supply of luteinizing hormone is often unstable and the amount is not enough, then as long as the supplemental oral or injectable luteinizing hormone can be solved. 2. Natural elimination of chromosomal abnormalities in embryos Many people would equate bleeding with miscarriage, but it is true that many embryo sacs fail to grow into fetuses and are called atrophic embryo sacs. When the fetus reaches 7 to 8 weeks, the heartbeat can already be confirmed through ultrasound, but there are some fetuses that suddenly have no heartbeat after 8 weeks. Experts say that whether it is an atrophied blastocyst or an embryo with no heartbeat later, about 60% of them are due to chromosomal abnormalities in the fertilized egg or problems with the fertilized egg itself, which is the result of natural elimination. Usually the mother will experience abdominal pain and bleeding, and even if the pregnancy is barely settled, the fetus may end up with a major structural defect. This is a natural elimination, pregnant mothers should not blame themselves too much for this. 3.Falling in early pregnancy It is very dangerous to fall in early pregnancy accidentally. In the absence of progesterone, falling often becomes a trigger for vaginal bleeding. At this time, it is important to recuperate quietly and rest more. As long as the embryo is good and the fetal heart is normal, there is usually no need to worry. It is also very important to keep a good state of mind and not to put too much pressure on yourself. Generally bleeding will not affect the fetus, as long as the fetus itself does not have any abnormality, it can develop healthily even during the continuous bleeding of the pregnant mother. There is nothing to worry about if you follow the doctor’s advice and recuperate peacefully. If your emotions become unsettled, please consult your primary care doctor immediately. If you have coffee-colored discharge in the initial stage after embryo transfer, there is no need to worry; if you have symptoms such as heavy bleeding and severe abdominal pain, you need to follow up or see the nearest emergency room in time, and you need to know the site of bleeding in detail and perform ultrasound examination if necessary to see if there is intrauterine bleeding.