1, reproductive endocrine examination 2 to 3 days after menstruation, sex hormone 6, routine blood, blood type, blood glucose, TSH, infertility antibodies, TSH abnormalities, re-examination of methyl work and antibodies; amenorrhea for more than 2 months, negative urine HCG, ultrasound examination of bilateral ovaries without follicles larger than 10mm, endometrial thickness less than 5mm can do sex hormone examination. Glucose tolerance test, insulin release test, glycosylated hemoglobin, blood lipid and liver function test for polycystic ovaries, obesity and scanty menstruation. 2. Hysterosalpingogram A hysterosalpingogram will be done 2 to 7 days after menstruation; if the fallopian tubes are open, ovulation will be promoted next month to help pregnancy; if the fallopian tubes are blocked, IVF will be done. 3.Ovulation promotion for pregnancy ①Pre-treatment for endocrine abnormalities: take contraceptive pills or estrogen and progestin for 1 to 2 months, and recheck sex hormones 2 to 3 days after next menstruation, and ovulation can be promoted after normal. ②Ovulation promotion method: take clomiphene 50mg/d orally (or letrozole 2.5mg/d) on 5-9 days of menstruation. (③) Ovulation measurement by negative ultrasound on 10-12 days of menstruation. The time of HMG injection and next negative ultrasound will be determined according to follicle size. ④Ovulation induction: follicles larger than 18-20mm are considered mature, intramuscular injection of HCG 5000-10000IU or subcutaneous injection of Dabigat 0.1-0.2mg on the same day/next day, intercourse on the second or third day after injection, and ultrasound to check whether follicles are expelled in 48-72 hours. ⑤ Luteal supplementation: take progesterone orally for 12-14 days after follicle discharge, and take your own pregnancy test the next day after taking progesterone.