Sexuality and reproduction.
D000367:Age Factors; D000818:Animals; D003075:Coitus; D005260:Female; D005306:Fertilization; D000882:Haplorhini; D006801:Humans; D007315:Insemination, Artificial; D008297:Male; D008423:Maternal Age; D008598:Menstruation; D009948:Orgasm; D010060:Ovulation; D012098:Reproduction; D012621:Seasons; D012730:Sex Chromosomes; D012744:Sex Ratio; D012725:Sexual Behavior