Symptoms of cessation of embryonic development after the third month of pregnancy are mainly in the following aspects. First, patients will experience abdominal pain, lowering of the abdomen or vaginal bleeding. This is mainly because after the embryo stops developing, the dead embryo and placenta will gradually separate from the uterine wall, and the uterus will contract to promote the discharge of embryonic tissue and placental tissue. Therefore, the patient will experience abdominal pain and bleeding. If the bleeding is heavy, it may be accompanied by the expulsion of embryonic tissue or placenta, and ultrasound is needed for examination. Secondly, if the patient does not have obvious bleeding and abdominal pain after the embryo stops developing, then during the follow-up observation, the patient’s abdomen does not have obvious bulge, that is, the patient’s uterus does not have obvious enlargement, and the embryo stops developing can be monitored by ultrasound. Thirdly, after the third month of pregnancy, the patient will be able to feel obvious fetal movement by about 4-5 months of pregnancy, so after the embryo stops developing, the patient will feel the sudden disappearance of fetal movement. So in this case, the patient should also pay attention to it and do the examination in time.