eggs choose sperm with the best genes during fertilization

analysis anatomy artificial baby bio biological biology biotechnology birth blue cell chromosome clone conception copulation dna egg embryo embryogenesis embryology evolution fecundation fertile fertility fertilization fertilize gamete gene genes genetic genetically health human illustration impregnation infertility insemination life liquid macro mating medical medicine micro microbiology microscope microscopic molecular molecule motherhood needle nucleus oocyte ovulation ovule ovum parent pregnancy pregnant procreation render rendering reproduction reproductive research science seed semen sperm spermatodoiz spermatozoa spermatozoon stem structure technology vitro zygocyte zygote