Ключевые слова: analysis, anatomy, baby, cell, chromosome, concept, donor, embryology, fertile, fertilisation, fertility, fertilization, flat, gene, genetic, graphic, group, head, healthy, human, icon, illustration, infertility, insemination, lab, life, male, mammalian, man, medical, microbiology, normal, nucleus, pregnancy, reproduction, reproductive, science, scientific, semen, set, sex, sexual, sperm, spermatozoa, spermatozoon, structure, system, tail, test,