title: Structural changes in vertebrate fetal membranes associated with the adoption of viviparity.
mesh_terms: D000220:Adaptation, Biological; D000663:Amphibians / Q000196:embryology; D000818:Animals; D005075:Biological Evolution; D001717:Birds / Q000196:embryology; D002642:Chick Embryo; D010064:Embryo Implantation; D004622:Embryo, Mammalian / Q000033:anatomy & histology; D004625:Embryo, Nonmammalian; D005321:Extraembryonic Membranes / Q000033:anatomy & histology* / Q000166:cytology / Q000502:physiology; D005260:Female; D005399:Fishes / Q000196:embryology; D008116:Lizards / Q000196:embryology; D008322:Mammals / Q000196:embryology; D010063:Ovum / Q000166:cytology; D012104:Reptiles / Q000196:embryology; D012911:Snakes / Q000196:embryology; D014327:Trophoblasts / Q000502:physiology; D014426:Turtles / Q000196:embryology; D014714:Vertebrates / Q000196:embryology*; D014817:Vitelline Membrane / Q000033:anatomy & histology