Biological components of human reproduction. Studies of their variations in population groups.
D003075:Coitus; D004812:Epidemiologic Methods; D005260:Female; D006128:Growth; D008572:Menarche; D008598:Menstruation; D011153:Population; D011247:Pregnancy; D011627:Puberty; D012098:Reproduction; D013997:Time Factors