title: X-ray opacification of placenta by intravenous use of tantalum.
mesh_terms: D000818:Animals; D005260:Female; D051379:Mice; D008815:Mice, Inbred Strains; D010920:Placenta / Q000098:blood supply / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011859:Radiography; D013635:Tantalum; D013679:Technology, Radiologic
chemical_list: D013635:Tantalum