Electron microscopy of the amnion and allantois in the sheep.
D000482:Allantois / Q000648:ultrastructure*; D000650:Amnion / Q000648:ultrastructure*; D000818:Animals; D005321:Extraembryonic Membranes / Q000648:ultrastructure*; D005260:Female; D008854:Microscopy, Electron; D011247:Pregnancy; D012756:Sheep / Q000033:anatomy & histology*