title: Nasal absorption of natural contraceptive steroids in rats-progesterone absorption.
mesh_terms: D000042:Absorption; D000281:Administration, Intranasal; D000818:Animals; D001682:Biological Availability; D004386:Duodenum; D007275:Injections, Intravenous; D007441:Intubation, Gastrointestinal; D009297:Nasal Mucosa / Q000378:metabolism*; D011374:Progesterone / Q000378:metabolism*; D051381:Rats
chemical_list: D011374:Progesterone