title: On the permeability of the guinea pig placenta to intravenously injected progesterone-4-14C.
mesh_terms: D005260:Female; D006168:Guinea Pigs; D007275:Injections, Intravenous; D010539:Permeability; D010920:Placenta / Q000502:physiology*; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology*
chemical_list: D011374:Progesterone
keywords: PLACENTA/physiology; PROGESTERONE/pharmacology