Ключевые слова: biology, birth, blastocyst, cell, cellular, conceive, conception, creation, diagram, dna, egg, female, fertilise, fertility, genetic, human, impregnation, inseminate, insemination, intercourse, male, man, motherhood, organism, ovary, penetration, pregnancy, pregnant, prenatal, race, reproduction, science, sperm, stem, swimming, uterus, woman,