title: Whistling maids and crowing hens--hermaphroditism in folklore and biology.
mesh_terms: D000818:Animals; D001154:Art; D001695:Biology; D001717:Birds / Q000502:physiology; D012734:Disorders of Sex Development; D005495:Folklore; D006066:Gonads / Q000502:physiology; D006801:Humans; D008322:Mammals / Q000502:physiology; D008512:Medicine in the Arts; D009229:Mythology; D012098:Reproduction; D012727:Sex Characteristics