Placentation in the American beaver (Castor canadensis).
D000650:Amnion; D000818:Animals; D003656:Decidua; D010064:Embryo Implantation; D005260:Female; D008854:Microscopy, Electron; D010920:Placenta / Q000033:anatomy & histology* / Q000098:blood supply / Q000166:cytology; D011247:Pregnancy; D012377:Rodentia / Q000196:embryology*