In the case of a pregnancy that is easily conceived but cannot be preserved, the cause of the miscarriage should first be determined. If the miscarriage is caused by luteal insufficiency, intramuscular progesterone injection, 20mg twice a day, or oral dextroprogesterone tablets, 10mg twice a day, should be given after pregnancy. if the miscarriage is caused by hypothyroidism, hyperthyroidism should also be treated during pregnancy, and small doses of thyroxine tablets should be given orally. If the pregnant woman has uterine malformation, she should be operated to treat the uterine malformation; if she has submucosal fibroids, she should be operated to remove the submucosal fibroids and then get pregnant again. At the same time after pregnancy should pay attention to bed rest, prohibit sexual intercourse.