The sex hormones we usually refer to are folliculogenic hormone, estrogen, testosterone, prolactin, androgen, luteinizing hormone and progesterone, which are generally used as important indicators for sex trait analysis and vary when it comes to hormone levels at each age. Sex hormones are present during embryogenesis and play an important role in the development of embryonic sexual characteristics. Maternal sex hormones are concerned with the normal development of the fetus, and if progesterone, lactogen and estrogen are at low levels during this period, there is a risk of miscarriage with slippage. After the birth of the baby, the hormone levels will be low and will gradually increase and reach a peak during puberty. It is normal for women to start increasing their sex hormones after the age of 13, and prematureness may cause unsound development. Progesterone can stimulate the proliferation of breast follicles and provide conditions for breastfeeding in the future. Progesterone stimulates the development of the uterus and the formation of the fallopian tubes and ovaries. Androgens and testosterone promote the production of male genitalia, especially in the testes where testosterone is more abundant. The normal glands in the human body have the ability to secrete hormones, but only when lesions or cellular aging occur may cause normal secretion of hormones or stop. In conclusion, sex hormones are an important differentiator of gender and an important part of the development of secondary sex characteristics. High or low levels of hormones can affect the normal functioning of the physiological structure.