Back, D J First-pass effect of norethindrone in rabbits and rats. [electronic resource] - The Journal of pharmacology and experimental therapeutics Nov 1978 - 555-65 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0022-3565 Subjects--Topical Terms: Administration, OralAnimalsDose-Response Relationship, DrugFemaleInjections, IntravenousIntestinal AbsorptionKineticsNorethindrone--administration & dosageRabbitsRats