Couples who do not get pregnant after more than 2 years of marriage and do not use any contraceptive measures are considered to be infertile and need both men and women to go to the hospital for health checkups to confirm what causes infertility. The checkups that women need to do are: 1. Female reproductive organ examination, including gynecological examination and routine white belt examination, to confirm whether there is vaginitis, cervicitis and other conditions. If these tests are normal, a tubal lavage or imaging test should be done to confirm if there are any abnormalities or blockages in the fallopian tubes that may affect pregnancy. 4. female sex hormone tests to rule out gynecological endocrine disorders leading to follicle formation and discharge disorders, etc. 5. immunological problems, including anti-cardiolipin antibodies, anti-sperm antibodies, anti-endometrial antibodies, anti-nuclear antibodies, closed antibodies, etc.