Ключевые слова: age, anatomy, balance, biochemistry, body, chart, chemical, chemistry, cycle, decline, decrease, diagram, education, estrogen, female, fertility, fertilization, girl, graphic, gynecology, health, high, hormonal, hormone, human, illustration, increase, infographic, level, loss, low, male, man, menopause, menstruation, oestrogen, period, physiology, science, sex, sexual, silhouette, stage, testosteron, testosterone, therapy, uterus, woman, women,