title: Embryogenesis in the rat: variation and developmental characteristics on gestational day 9.
mesh_terms: D000818:Animals; D004622:Embryo, Mammalian / Q000033:anatomy & histology; D005260:Female; D005865:Gestational Age; D009024:Morphogenesis; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains / Q000196:embryology*