I. Before artificial insemination 1, suitable for artificial insemination of infertile couples, prepare three certificates (ID card, marriage certificate, family planning service certificate or birth certificate), check, and then prescribe preoperative examination. 2, bring all the original preoperative examination results, the original and copies of the three certificates, outpatient audit and registration, the couple sign the artificial insemination consent form, write the medical record. IUI process 1. Come to the clinic within 5 days of menstruation (or as requested by the doctor), start using ovulation-promoting drugs and monitor follicle development regularly. 2. When the follicles are mature, the couple will receive ovulation injection and make an appointment for artificial insemination as required. 3.On the day of artificial insemination, both couples go to the infertility clinic (with all three certificates), and after the laboratory staff verifies the identity, the husband receives the sperm collection cup and retrieves the sperm in the sperm collection room. 4.The semen taken out will be handed back to the artificial insemination laboratory staff, and after verification, the semen will be processed. It takes about 2 hours. 5.After the semen processing is completed, the female partner empties her urine and receives artificial insemination in the artificial insemination room, and lies flat with her hips elevated for 30 minutes after the operation. After IUI 1.The day after IUI, outpatient ultrasound will monitor ovulation and inject luteal support drugs. 2. Come to the clinic for urine test 14 to 16 days after IUI. If positive, ultrasound will be done in the clinic after 3 weeks to understand the pregnancy situation. 3.Mother and baby will be checked every 3 months during pregnancy and followed up until 1 month after delivery.