title: Embryology of the sheep. I. Extraembryonic membranes and the development of body form.
mesh_terms: D000650:Amnion / Q000033:anatomy & histology; D000818:Animals; D005321:Extraembryonic Membranes / Q000033:anatomy & histology*; D005260:Female; D005865:Gestational Age; D008297:Male; D009024:Morphogenesis; D010920:Placenta / Q000033:anatomy & histology; D011247:Pregnancy; D012756:Sheep / Q000196:embryology*; D013997:Time Factors