Infertility is a barrier to pregnancy, while infertility is a condition in which some people get pregnant easily but fail to have a live baby, mostly through repeated miscarriages or premature births, and some have had stillbirths. People who experience this have a mixture of expectation of a successful pregnancy and fear of losing another pregnancy halfway through the pregnancy, and suffer psychologically and physically more than those who are infertile …… Where the pregnancy is less than 28 weeks, the pregnancy is terminated and the fetus is expelled without the possibility of survival, it is called abortion. The occurrence of three or more consecutive spontaneous abortions, formerly called habitual abortion, is now called recurrent spontaneous abortion. Repeated miscarriage is the main cause of infertility, and its causes include: 1. chromosomal abnormalities of the couple or embryo. 2, uterine anomalies: uterine malformation, cervical insufficiency, uterine adhesions, uterine vascular anomalies, uterine fibroids or myometriosis. 3.Endocrine factors: luteal insufficiency, polycystic ovary syndrome, endometriosis, diabetes, hyperthyroidism or hypothyroidism. 4, immune factors: blood type incompatibility and other autoantibodies abnormalities. 5.Infection factors: bacteria, virus, mycoplasma, chlamydia, etc. 6.Maternal systemic diseases. 7. Abnormal paternal semen. 8. Unknown cause. For repeated spontaneous abortions, pre-conception and post-conception etiological examination and etiological treatment should be carried out, among which there is no effective treatment for chromosomal abnormalities. 1. Induced abortion can lead to cervical injury and uterine adhesions secondary to recurrent spontaneous abortion, and unwanted pregnancy and abortion should be avoided as much as possible. 2.Embryonic chromosomal abnormalities, fetal preservation is not effective. 3. Immunotherapy has clear indications and has efficacy and more risks, and should be performed in experienced specialized medical units. 4. Chinese medicine treatment can be tried.