Spontaneous miscarriage, especially inevitable miscarriage, is a painful experience for the patient and her family, and repeated miscarriages are even more traumatic physically and mentally. The more stressful and mentally taxing it is, the more it will come to affect the next pregnancy. Therefore, after the occurrence of miscarriage, it is necessary to conduct timely and appropriate examination for targeted treatment. A. Western medical causes: reproductive endocrine factors: luteal dysfunction, thyroid function abnormalities, etc.. This can be determined by basal body temperature, hormone measurement, ultrasound monitoring of ovulation, etc. Uterine and cervical factors: uterine malformation, uterine adhesions & endometrial damage, fibroids, endometrial polyps, endometriosis, cervical insufficiency, etc. It can be examined by ultrasound, imaging, lumpectomy, etc. Infectious factors: TORCH, chlamydia, mycoplasma infection, etc. It can be checked by blood test and cervical secretion. Genetic factors: chromosomal abnormalities. It can be screened by checking peripheral blood and embryonic tissue chromosomes of both men and women. Immune factors: antiphospholipid antibody, anti-sperm antibody, blood group antibody, closed antibody, etc. Pre-thrombotic state: congenital and acquired. Risk can be evaluated by testing coagulation-fibrinolysis-related indicators and blood rheology indicators. Male factor: oligospermia, which can be examined by semen analysis, sex hormone assay, etc. and so on. Second, pay attention to Chinese medicine to identify the cause: In the clinic, there are some patients with habitual miscarriage, although through modern instruments and equipment for adequate examination, still can not find any cause of miscarriage. For these families, they are afraid of finding out the cause, but even more afraid of not being able to find out the cause, and they are even afraid of talking about pregnancy. Chinese medicine is very profound and profound, and there are many valuable experiences in the treatment of miscarriage by doctors in the past generations. My suggestion is that whether you go to Western medicine to find out the cause or not, do not ignore the diagnosis of the cause of Chinese medicine. When the cause cannot be found in western medicine, it is even more valuable to identify the cause in Chinese medicine. In many patients, although endocrine and immune problems are detected, due to some competent or objective reasons, they achieve a successful pregnancy and delivery with only TCM treatment without Western medicine targeted treatment. For those who have had a miscarriage, it is important to find a real TCM doctor to look and analyze the evidence, to clarify the TCM cause of the miscarriage, to determine your TCM constitution, to give targeted TCM treatment, to lay a good foundation before conception, to choose the right time to conceive, and to reduce the risk of another miscarriage. The TCM conditioning after miscarriage takes about 3-6 months, and can be shortened for older people.