Spontaneous miscarriage after the first month of pregnancy may be caused by intrinsic factors such as low maternal hormones, embryonic abnormalities, infections, or extrinsic factors such as trauma, and usually requires a hospital visit to identify the cause and treat it accordingly. Common causes and treatment 1, extrinsic factors: in the first month of pregnancy, due to the short time of the gestational sac in the uterus and the small size of the gestational sac formed, this time period belongs to the high incidence of miscarriage. If the pregnant woman’s abdomen is squeezed or hit by external force or heavy physical activities, it may lead to miscarriage. 2. Intrinsic factors: it may be caused by chromosomal abnormalities of the embryo, insufficient luteal function of the mother, endocrine abnormalities, etc. It may also cause miscarriage due to uterine contractions caused by violent mood swings of the pregnant woman. Patients need to identify the cause of spontaneous miscarriage and provide symptomatic treatment to prepare for the next pregnancy. Within half a month after a spontaneous abortion, it is necessary to pay attention to avoid contact with cold water or heavy physical labor and to keep warm to prevent infection with wind and cold. The patient should maintain a regular daily routine and eat more eggs, milk and meat to improve the body’s resistance. Patients need to clarify whether the miscarriage is occasional or frequent. If spontaneous miscarriage occurs 2 times in a row, recurrent miscarriage can be considered and need to go to the hospital in time to treat the cause under the guidance of professional doctors.