In infertility, male factor alone accounts for about 40%, female factor alone accounts for about 40%-55%, both factors account for 10%-20%, and unknown causes account for about 10%. Because male fertility tests are convenient, non-invasive and inexpensive, men are generally checked first, and semen tests are checked in different rooms for five to seven days, while women are checked in principle from simple to complex. The best way to monitor ovulation is by transvaginal ultrasound, which usually starts on the 8th to 10th day of the normal menstrual cycle. If the follicles are immature, come to check the endocrine secretion on the 2nd to 4th day of menstrual cycle on an empty stomach, if it is normal, ovulation can be promoted. Checking the patency of the fallopian tubes The examination of the function of the fallopian tubes is the most important part of the infertility examination and is a prerequisite for choosing the right treatment for infertility patients. It is usually performed 3-7 days after the patient’s menstruation. 1.Tubal lavage: It is more commonly used and less invasive, but the internal and external appearance of the uterine cavity and fallopian tubes cannot be seen, so the site of obstruction is not known if there is any. 2, tubal iodine contrast (HSG): Under fluoroscopy, iodine is injected into the uterine cavity through a catheter, and the obstruction can be seen. It is a common test. Pregnancy is possible only when ovulation is normal, the fallopian tubes are open and semen is normal, and the timing of intercourse is well controlled.