If you have not been married for three years and are not pregnant, the couple must have a detailed examination. The male partner can have a routine semen test after a week of no sex. The female partner should have more tests, and it is recommended to go to the hospital at any time after menstruation for a gynecological examination to understand the development of the vulva, vagina and cervix. It is also necessary to exclude inflammation of the vagina and cervix, as well as inflammation of the pelvis. Ultrasound examination is also needed to understand the condition of the endometrium, the size of the uterus, whether there are abnormalities in the development of the uterus, and whether there are tumors in the pelvis. Blood tests such as sex hormone test, thyroid function test and immunological infertility test are also required. In addition, routine laboratory tests of the white belt are also needed to rule out the possibility of vaginal inflammation. If necessary, a tubal imaging is also needed to rule out the possibility of tubal obstruction. Ultrasound is also needed to monitor ovulation from the twelfth day of menstruation.