External human fertilization.
D033421:Beginning of Human Life; D033041:Embryo Research; D004992:Ethics, Medical; D005260:Female; D005307:Fertilization in Vitro; D005826:Genetics, Medical; D006803:Human Development; D006805:Human Experimentation; D006801:Humans; D019369:Life; D008297:Male; D028723:Personhood; D011640:Public Policy; D012098:Reproduction