Infertility and infertility are not the same thing. Infertility is a disorder of 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 …… Medical Knowledge Quick Reads Any pregnancy terminated at less than 28 weeks of gestation with no possibility of survival after expulsion of the fetus is called miscarriage. 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 abnormalities: uterine malformations, cervical insufficiency, uterine adhesions, uterine vascular abnormalities, uterine fibroids or myometriosis; 3. endocrine factors: luteal insufficiency, polycystic ovary syndrome, endometriosis, diabetes mellitus, hyperthyroidism or hypothyroidism; 4. immune factors: blood type incompatibility and other autoantibody abnormalities; 5. 5. Infectious factors: bacteria, virus, mycoplasma, chlamydia, etc.; 6. maternal systemic diseases; 7. paternal semen abnormalities; 8. unknown causes. For recurrent spontaneous abortions, pre- and post-conception etiological examination and etiological treatment should be carried out, among which there is no effective treatment for chromosomal abnormalities. Key only words Induced abortion can lead to cervical injury and cervical adhesions secondary to recurrent spontaneous abortion, and unwanted pregnancy and abortion should be avoided as much as possible. Embryonic chromosomal abnormalities make fetal preservation ineffective. Immunotherapy has clear indications and has efficacy but also risks, and should be performed in experienced specialized medical units. Chinese medicine treatment can be tried.