title: The evolution of viviparity and placentation revisited.
authors.forename: C P
authors.initials: CP
authors.lastname: Qualls
authors.forename: R M
authors.initials: RM
authors.lastname: Andrews
authors.forename: T
authors.initials: T
authors.lastname: Mathies
mesh_terms: D000818:Animals; D005075:Biological Evolution; D005260:Female; D008954:Models, Biological; D010929:Placentation; D011247:Pregnancy; D011270:Pregnancy, Animal; D012104:Reptiles / Q000502:physiology*