From a physiological point of view, it is best for women to have children around the age of 20: easy pregnancy, high rate of normal delivery, quick recovery after delivery, and fewer birth defects. However, women in this age group are often not mature enough mentally, and may not have completed their education or have a stable job. Therefore 25-28 years old is considered the optimal age for childbirth. Because women in their twenties generally have more normal ovarian function, more healthy egg cells in their ovaries, and about a 25% chance of getting pregnant each month, a normal person who has not conceived naturally for more than a year of pregnancy preparation is considered infertile. Women in their twenties have a low rate of spontaneous abortion after pregnancy, about 5%, and the incidence of Down’s syndrome is about 1/1200. women over 35 have a monthly pregnancy rate of about 10%. In contrast, the ability of women over the age of 40 to become pregnant decreases dramatically, with a monthly pregnancy rate of only about 5%. At present, the incidence of premarital sex and the rate of abortion among unmarried people are on the rise. The accelerated pace of life and the direct or indirect effects of lifestyle have a negative impact on the human endocrine system and reproductive capacity. It is an indisputable fact that the incidence of infertility is significantly increasing. Thus, it is recommended to consider childbirth at the optimal age of fertility whenever possible.