Ключевые слова: balance, biochemistry, biology, cervix, chemical, climacteric, contraception, cortisol, disease, dopamine, drug, endocrine, estradiol, estrogen, female, fertile, fertility, fertilization, gynecology, health, health care, healthy, hormonal, hormone, hormones, illness, infertility, medical, medicine, melatonin, menopause, menstruation, molecule, organ, ovarian, ovary, ovulation, period, pharmacy, pregnancy, progesterone, reproduction, reproductive, science, scientific, serotonin, testosterone, treatment, uterine,