Anyone who has had three or more spontaneous abortions in a row is clinically known as habitual abortion. Some people tend to mistake delayed menstruation or anovulatory uterine bleeding with a short period of amenorrhea for miscarriage, but in fact it is not necessarily a pregnancy miscarriage, and in this case must be distinguished by a urine pregnancy test. There are various causes of habitual miscarriage. The miscarriage is often caused in the middle of the pregnancy by a mother/child blood group discrepancy. Abnormalities of the egg or sperm, including chromosomal alterations, prevent the embryo from developing normally, resulting in miscarriage. In addition, inadequate preparation of the endometrium for implantation by a dysfunctional corpus luteum can also affect implantation of the pregnant egg. Low thyroid function affects the development of the embryo and can cause recurrent miscarriages. In patients with tumors of the reproductive organs, systemic and local irritants also tend to cause impaired embryonic development, which can lead to miscarriage. For patients with habitual miscarriage, the causes of miscarriage should be identified before pregnancy so that treatment can be targeted. These tests should be performed on both men and women, and include chromosomal abnormalities on both sides, and the male partner should check the genitalia and semen. The female partner should know the duration of pregnancy for each miscarriage in order to provide clues to estimate the cause of the miscarriage. The pelvic genitalia should be checked for abnormalities, congenital malformations and uterine fibroids; basal body temperature should be measured and endometrium should be taken during menstruation and sent for pathological examination to speculate on luteal function. Vaginal smear and cervical mucus crystallography should be performed to understand estrogen levels. In addition, blood glucose and urine glucose should be checked to exclude diabetes mellitus, liver function and antibodies to exclude B sunset infection, and ABO blood group and RhN son test. The treatment of habitual miscarriage should vary from person to person. If the cause is clear, we should try to treat the cause. For those whose causes are not clear or for whom no specific treatment is available, GleN – general treatment. The following treatment methods and principles are available for reference. In cases of luteal insufficiency of the female partner (this is often the main cause of habitual abortion). Chorionic gonadotropin, natural progesterone plus herbal treatment is often perfect. For recurrent refractory miscarriages herbal treatment is most important. Department of Rehabilitation and Physiotherapy, Affiliated Hospital of Hebei University Xue Yongfeng Tian Zhen, Reproductive Center of Affiliated Hospital of Hebei University Surgical treatment: Those with habitual miscarriage due to uterine fibroids should undergo myoma stabbing and removal. For miscarriage due to loosening of the uterus, cervical cerclage should be performed during pregnancy, preferably at 12-23 weeks of gestation. If it is done too early, there is a risk of preserving the abnormal embryo, while if it is done too late, it may lead to miscarriage. If the water breaks during the procedure or if there are contractions, the stitches should be removed to prevent uterine rupture. If the pregnancy is maintained, the loop can be removed at 38 weeks of gestation and the fetus can be removed by cesarean section or delivered vaginally. In my clinical practice, I believe that the treatment of fetal preservation is more appropriate than the treatment of infertility.