The embryo stops developing may be due to the couple’s chromosomal reasons, but also due to the influence of external factors, pregnant women’s bad habits and other reasons. 1. Couple chromosome abnormality: the more common reason, both husband and wife or one side of the chromosome problem itself, the formation of new embryos will also have problems, so there will be a poor development of the embryo, the embryo stops developing. 2. The influence of external factors: such as environmental factors, pregnant women exposed to harmful substances, radiation, chemicals or high temperature and other conditions, may have a negative impact on the growth and development of the fetus, resulting in the cessation of fetal development. 3. Bad habits of pregnant women: Pregnant women who have bad habits, such as smoking, drinking, etc., may cause abnormal changes in the process of embryonic development, and the fetus stops developing. Fetal arrest may also be caused by endocrine disorders and immune factors such as systemic lupus erythematosus. Once the embryo stops developing, it is recommended to consult a doctor in time, under the guidance of the doctor, complete the relevant examinations, clarify the cause of the disease and treat the symptoms.