Recurrent miscarriage is one of the common and difficult problems in obstetrics and gynecology, with an incidence of about 1-5%. There are many factors that cause recurrent miscarriage, among which only 70% of the causes can be identified, but with the current medical methods, many patients cannot find out the cause, which is called unexplained recurrent miscarriage. Unexplained recurrent miscarriage mostly occurs in early pregnancy, when the baby quietly “flows” away, pregnant mothers can only silently bear the unimaginable pressure, causing them great physical and mental pain. The occurrence of unexplained recurrent miscarriages is a tragedy for patients and a challenge for doctors. As a genetic eugenics center, we need to be proactive so that miscarriage is no longer reactive. Our center has introduced the Active Lymphocyte Immunotherapy Program for the targeted treatment of patients with unexplained recurrent miscarriages. The main advantages of the program are mature technology, safety and reliability, and significant efficacy. 40 to 80% of unexplained recurrent early spontaneous abortions are related to immune factors, and lymphocyte immunotherapy has given hope to couples with unexplained recurrent abortions. Significant clinical results have been achieved through immunotherapy, with a high pregnancy success rate and good social benefits.