Ключевые слова: biology, cell, competition, concept, conception, dna, egg, ejaculation, female, fertile, fertility, fertilization, fertilize, gene, genetic, health, human, insemination, life, male, medical, medicine, micro, micrograph, microscope, microscopic, ovulation, ovule, ovum, pregnancy, procreation, reproduction, reproductive, research, science, semen, sex, sperm, spermatozoa, spermatozoon, symbol, winner, zygote,