The World Health Organization defines one year of cohabitation without any contraceptive measures without pregnancy as infertility, while the current regulation in China is two years of cohabitation without pregnancy, but usually couples have regular sex 1 year chance of pregnancy at about 85%, the incidence of infertility at about 15%, so 1 year without pregnancy requires further examination of the causes. The main reasons for not getting pregnant after one year of marriage include the following: first, male factor, the most common being sperm abnormality. Second, the female factor, the most common is ovulation disorder and tubal disease. Thirdly, the factors of both parties, including diseases of both parties, also including irregular sex life, inappropriate timing of intercourse, immune factors, etc.