title: Conjoined twins presenting with different sex: description of a second case that truly represents the earliest historical evidence in humans.
authors.forename: María Luisa
authors.initials: ML
authors.lastname: Martínez-Frías
mesh_terms: D005260:Female; D049690:History, Ancient; D006801:Humans; D008297:Male; D008512:Medicine in the Arts; D009549:Nigeria; D012613:Sculpture; D012727:Sex Characteristics; D014428:Twins, Conjoined / Q000473:pathology; D014429:Twins, Dizygotic