Favaron, P O An unusual feature of yolk sac placentation in Necromys lasiurus (Rodentia, Cricetidae, Sigmodontinae). [electronic resource] - Placenta Jul 2012 - 578-80 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1532-3102 Standard No.: 10.1016/j.placenta.2012.02.011 doi Subjects--Topical Terms: AnimalsEmbryo Implantation--physiologyFemaleMicroscopy, Electron, TransmissionPlacentation--physiologyPregnancySigmodontinae--anatomy & histologyUterus--ultrastructureYolk Sac--blood supply