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