Ключевые слова: baby, biology, birth, calendar, cell, clock, competition, concept, contraception, copy, cycle, day, dna, doctor, egg, female, fertile, genetic, gynecology, health, hormone, human, man, medicine, menses, menstrual, menstruation, newborn, ovary, ovulation, period, person, pills, planning, pregnancy, pregnant, process, procreation, reproduction, science, semen, sex, silhouette, space, sperm, test, text, time, uterus, woman,