The doctor can only help you find the cause by asking a detailed medical history, menstrual history, fertility history, family history, past history, and a series of tests. Previous labs, surgical records and treatment plans are all brought in to avoid duplication of tests Self-tested basal body temperature and recorded, brought in at the time of the visit: 1. Karyotype analysis of both partners (venous blood drawn from the couple, not affected by dietary menstrual cycle) Embryonic SNP gene test (in case of unavoidable miscarriage, embryonic chorionic hair will be taken and sent for testing when the uterus is cleared, in Chiayi). 2.Male partner semen routine (abstinence 3-5 days to check semen) ultrasound examination of prostate, spermatic vein, etc. 3.BBT (Basal body temperature curve, self-testing basal body temperature every month). 4.Sex hormone 7 (blood FSH, LH, E2, P, PRL, T, DHEAS) (blood drawn on the 3rd-5th day of menstruation) thyroid hormone test (T3, T4, TSH, TPOAb, TGAb) (not affected by menstrual cycle) glucose tolerance test (OGTT), insulin antagonism (IR) measurement. 5.TORCH (cytomegalovirus CMV, toxoplasma TOX, rubella virus RUV, herpes virus HSV) IgM, IgG mycoplasma, chlamydia (take cervical mucus, non-menstrual) gynecological examination, white belt routine, BV, cervical TCT . 6. Couple ABO blood group, Rh blood group, anti-A potency, anti-B potency. 7. Phospholipid antibody D dimer. 8. Antibodies to hyaline band. 9.Closure antibody, unique type antibody, closure efficiency, Treg (RSA) (104 appointments are required, and blood is drawn from the Red House Hospital Institute every Thursday at 8:00 am for both spouses at the same time). 10.Hysterosalpingogram H.S.G (clean menstruation without intercourse; leucorrhoea trichomonas mycobacteria PC negative). 11.Hysteroscopy (clean menstruation without intercourse) (preoperative full set, ECG, ultrasound, etc.). Note: 1. Bring all previous labs, surgery records and treatment plans to avoid duplication of tests. 2. Take your own basal body temperature and record it, and bring it to the clinic. 3.Please pay attention to the stop notice before each visit.