Gametogenesis, fertilization and early development.
D000818:Animals; D002454:Cell Differentiation; D010064:Embryo Implantation; D047108:Embryonic Development; D005260:Female; D005306:Fertilization; D005854:Germ Cells / Q000254:growth & development*; D006801:Humans; D008297:Male; D011247:Pregnancy; D013075:Sperm Capacitation; D013084:Sperm-Ovum Interactions