There is no three most accurate signs in the case of fetal arrest, but the signs that often appear are the persistent absence of fetal heartbeat and buds, sudden and unexplained abdominal pain, weakening or disappearance of vomiting and frequent urination, and reddening of the eyes. 1. Persistent absence of fetal heartbeat and buds: Generally speaking, most of the fetal heartbeat and buds can be seen between 6 and 9 weeks of pregnancy, if the fetal heartbeat and buds are not seen all the time, it probably means that the embryo has stopped developing. 2. Sudden and unexplained abdominal pain: in the early stages of pregnancy, pregnant women will have a slight pain in their stomachs, somewhat similar to the kind of pain during menstruation. But if the pregnant woman’s abdominal pain is very obvious and the pain is irregular and irregular, then it is best to rush to the hospital for a more detailed examination. 3. pregnancy vomiting and urinary frequency weakened or disappeared: pregnant women in the early stages of pregnancy will be due to changes in hormone levels in the body of pregnancy vomiting, urinary frequency and so on, if pregnancy vomiting disappeared during pregnancy or urinary frequency alleviation, it is recommended to go to the hospital for the appropriate examination to ensure that the fetus develops normally. 4. Seeing red: after fetal arrest, the embryo can be aborted, and pregnant women can experience vaginal bleeding. During pregnancy, women should have regular obstetric examination to know the development of the embryo, if the above abnormalities occur, there may be fetal arrest, need to pay attention to and promptly go to the hospital for examination and clarification.