Administration, CutaneousDydrogesteroneEstrogensEstrogen Replacement TherapyEstrogens, Conjugated (USP)PostmenopauseAdministration, OralEstradiolTransdermal PatchReceptors, EstrogenSkin AbsorptionEstrogen Receptor alphaEstrogen Receptor betaFentanylDrug Delivery SystemsEstrogens, CatecholPhonophoresisSkinNeedlesOvariectomyIontophoresisSelective Estrogen Receptor ModulatorsPharmaceutical VehiclesNitroglycerinEstrogens, Non-SteroidalChemistry, PharmaceuticalBreast NeoplasmsRats, HairlessNicotineSkin Irritancy TestsDiffusion Chambers, CultureTamoxifenPermeabilityDelayed-Action PreparationsProgestinsEstradiol CongenersScopolamine HydrobromideEthinyl EstradiolAromataseUterusEstroneDrug CarriersReceptors, ProgesteroneDiethylstilbestrolAnalgesics, OpioidDouble-Blind MethodMyristatesTechnology, PharmaceuticalTestosteroneDrug CompoundingEmulsionsGelsNorprogesteronesHormone Replacement TherapyProgesteroneMedroxyprogesterone AcetateAdhesivesLecithinsProgesterone CongenersClimacteric