Definition: Couple of childbearing age who are sexually active, living together without contraception, and have not conceived within one year. Primary infertility: never conceived. Secondary infertility: A history of pregnancy and childbirth, followed by no further conception. If you have any of the following conditions, you should seek medical help early: 1. No menstruation for more than 3 months. 2. A history of two or more miscarriages (induced or spontaneous). 3. The male partner has suffered from acute or chronic prostatitis. 4.Menstrual cycle equal to or shorter than 3 weeks. 5.History of pelvic inflammatory disease or gynecological surgery. 6.The female partner is over 30 years old.