Seasonal variation in human sexual activity.
D000022:Abortion, Spontaneous / Q000453:epidemiology; D000858:Anovulation; D001723:Birth Rate; D003075:Coitus; D004644:Emotions; D005260:Female; D005843:Geography; D006801:Humans; D007086:Illegitimacy; D007989:Libido; D008297:Male; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D012621:Seasons; D012725:Sexual Behavior