realistic detailed spermatozoids runs towards the egg, live competition concept

fertility pregnancy spermatozoid cell fertile genetic illustration medicine science sperm egg fertilization health reproduction sex spermatozoon biology female fertilize life ovum procreation reproductive competition conception ovule care microscope penetration generation healthcare incipience infertile ovulation microscopic sexual vector artificial fecundation impregnation anatomy pregnant contraception biological fertilizer ejaculation line symbol spermatozoa winner leader