Ключевые слова: biology, black, cell, concept, design, diagnostic, element, evolution, fertility, fertilization, fertilized, flat, genetic, graphic, health and medical, human, icon, illustration, increased, isolated, line, linear, male, medical, medicine, object, outline, ovulation, ovule, ovum, pregnancy, seeder, sex, shape, sign, silhouette, simple, singles, sperm cell, sperm cells, sperm donor, sperm icon, spermatozoa, spermatozoon, symbol, white,