After experiencing repeated miscarriages, the couple should seriously look for the causes, it is necessary to go to the hospital for a systematic examination, and cooperate with the doctor to do a good investigation of the relevant family history and environmental factors, in order to find out the causes of miscarriage and treat the symptoms. Generally speaking, the following tests should be done: 1. peripheral blood chromosome examination to exclude genetic factors. 2. Hysterosalpingography or hysteroscopy to rule out anatomical abnormalities of the reproductive organs. 3. Husband’s semen examination to exclude male factors. 4. Fasting and 2-hour postprandial glucose measurement to exclude diabetes. 5.Thyroid function measurement to exclude abnormal thyroid function. 6.Reproductive endocrine hormone measurement to exclude reproductive endocrine diseases. 7.Chromosome examination. Chromosomal abnormality of one of the spouses is an important cause of chromosomal abnormality of embryo and spontaneous miscarriage. 8, gynecological examination. The presence of uterine anomalies, such as double uterus, unicornuate uterus, etc., can affect early embryo implantation and miscarriage; the presence of uterine fibroids, especially submucosal fibroids; ovarian function measurement, such as vaginal smear to determine hormone levels and basal body temperature. 9.Blood type examination. Check the blood type of both spouses. 10.Investigation of environmental factors. Drug exposure, environmental pollution and viral infection can cause miscarriage. The sensitive period for miscarriage caused by radiation is before or immediately after menstruation. In addition, TORCH test should be done to clarify whether there are infectious factors, as well as ABO blood group antibody test and cardiolipin antibody test. If the cause of miscarriage has been identified, the treatment must follow medical advice; if the cause of miscarriage is unknown, you can stop having sex, rest in bed and take vitamin E, C and B supplements when your menstruation is slightly delayed, your basal body temperature does not drop and pregnancy is suspected, so as to improve the survival rate of the fetus.