On balance, pregnancy vomiting does not usually cause fetal abortion. However, for pregnancy vomiting is very strong and not treated in time, it is a very big challenge to the life of the pregnant woman herself, so to some extent, if the pregnancy vomiting is strong, due to the acid-base imbalance of the pregnant woman, or after the symptoms of shock, it will indeed affect the development of the embryo to a certain extent, and further may cause fetal abortion. However, there are many causes of fetal abortion, including acute maternal infection, or hypertension and hyperglycemia during pregnancy; the embryo itself is not very well developed, which is also an important cause of fetal abortion. There is also the case of external environment, if it is external environmental radiation, etc., these factors are more powerful and sometimes they do cause the embryo to stop developing, which in turn causes fetal abortion.