title: Continual sexual receptivity in the female chimpanzee (Pan troglodytes).
abstract: Daily observations during a 5-year period showed that the mean frequencies of copulation per day during various sexual states of the female chimpanzee were almost identical, except for during maximum tumescence and lactation. The mean frequency of observed copulation peaked during maximum tumescence and was lowest during lactation.
mesh_terms: D000818:Animals; D003307:Copulation; D005260:Female; D007774:Lactation; D008297:Male; D008598:Menstruation; D002679:Pan troglodytes / Q000502:physiology*; D011247:Pregnancy; D012726:Sexual Behavior, Animal