Artificial insemination is a technique to deliver sperm into the female reproductive tract in a non-coital manner for the purpose of conception. Indications for artificial insemination by husband: 1. Abnormal semen: mild or moderate oligospermia (density 5-20 million/ml), weak sperm (a < 20%, a+b < 50%), non-serious deformed spermatozoa, abnormal liquefaction. 2.Cervical mucus abnormalities causing sperm unable to pass through the cervix leading to infertility. 3. Sexual dysfunction or genital tract abnormality causing sexual intercourse disorder. 4. Ovulation disorders (such as polycystic ovary syndrome) and endometriosis that are not conceived by simple drug treatment. 5.Unexplained infertility. 6.Immune infertility. Pre-operative: with (birth control certificate, ID card, marriage certificate) Pre-operative examination: Female partner: gynecological examination, tubal imaging or laparoscopy, routine blood and urine, ECG, liver and kidney function, hepatitis B two-to-one and hepatitis series, infectious disease screening (HIV, hepatitis C, syphilis), TORCH (toxoplasmosis, rubella, cytomegalovirus, herpes virus, etc.) infertility series. Male partner: Male examination, at least two semen routines + morphology, Hepatitis B 2:30 + Hepatitis series + Infectious disease screening. Methods: Natural cycle Ovulation promotion cycle