5 weeks of pregnancy belongs to the early stage of pregnancy, if the regular menstrual cycle comes once in 28 days, 5 weeks of pregnancy can just form the gestational sac, if embryonic abortion occurs may have the following symptoms: first, bleeding, at first a small amount of bleeding, dark red or brown in color, with the longer the abortion may increase bleeding, even more than the amount of menstruation. Secondly, abdominal pain. After the embryo stops developing, the uterus will regard the gestational sac as a foreign body and initiate contractions with the intention of expelling the embryonic tissue. Thirdly, the accompanying symptoms of early pregnancy will disappear, such as nausea, vomiting, frequent urination, abdominal discomfort and other sensations will gradually disappear. Once the embryonic abortion is confirmed, the pregnancy should be terminated as early as possible, either by medical abortion or abortion. If the embryo stops developing and the pregnancy is not terminated early, it may lead to mechanization and necrosis of the embryonic tissues, which will adhere to the uterine wall and damage the endometrial tissue.