Spontaneous miscarriages that occur two or more times in a row are called recurrent miscarriages. The patient couple needs to go to the hospital for the following tests: 1. Chromosomal examination: The couple will have blood drawn in the morning on an empty stomach (the hospital examination time is every Friday) to clarify whether there are chromosomal abnormalities. If there are chromosomal abnormalities, genetic counseling is needed to clarify the way through which a healthy fetus can be conceived. For embryos that have already had more than 2 miscarriages, it is best to send chorionic villus chromosome examination at the time of miscarriage surgery to clarify whether the embryo has chromosomal abnormalities. 2. 2-4 days after the woman’s period: fasting blood test for endocrine hormones to clarify whether there are ovarian and thyroid abnormalities, hyperprolactinemia, diabetes and other endocrine dysfunctions, if there are abnormalities, medication is needed. 3. 3-7 days after the woman’s menstruation: Hysterosalpingography or hysteroscopy (avoid intercourse 3 days in advance) to determine if there are abnormalities of the uterus, adhesions, submucosal fibroids, relaxation of the endocervical opening, etc. If there are abnormalities, surgery is needed. 4. Immunological and thrombotic factors: The female partner should have blood tests at any time, including anti-nuclear antibodies, antiphospholipid antibodies, anti-thyroid antibodies and closed antibodies, coagulation status, and if there are any abnormalities, medication and immunotherapy are feasible. 5, infection factors: cervical mycoplasma, chlamydia infection. You can check the cervical secretions to determine, if there is an infection, both spouses need simultaneous anti-infection treatment. 6, the male partner: empty semen 2-7 days to perform semen examination. 7, environmental factors: smoking, alcohol, excessive coffee, radiation, organic solvents, heavy metals, pesticides and other factors may lead to abortion. About 50-70% of recurrent miscarriages can find a clear cause, and 2/3 of couples can have a successful pregnancy after treatment, but because some embryos have chromosomal abnormalities, they will eventually stop developing despite a variety of fetal preservation measures. Couples with a history of recurrent miscarriage need to have a correct understanding and aim to obtain a healthy child. The survival of the fittest is an unchangeable law of nature and an inevitable law of species and ethnographic optimization, so there is no need to be too upset about a bad embryo and actively prepare physically and mentally to welcome the next healthy life.