EstroneEstradiolEstrogensEstriolCorpus LuteumProgesterone CongenersProgestinsGonadal Steroid HormonesUterusMifepristoneLuteinizing HormoneEstrusPregnancyPregnancy, AnimalPregnanediolAndrostenedioneOvariectomy17-Hydroxysteroid DehydrogenasesMenstrual CycleLuteal PhaseReceptors, EstrogenOvulationOvaryEndometriumTestosteronePseudopregnancyFollicle Stimulating HormoneSteryl-SulfataseSteroidsBreast NeoplasmsHormone AntagonistsAromataseEstradiol DehydrogenasesChorionic GonadotropinRadioimmunoassayHydroxyestronesDinoprostGranulosa Cells20-Hydroxysteroid DehydrogenasesHydroxyprogesteronesLuteal CellsSex Hormone-Binding GlobulinPostmenopauseCastrationGonanes20-alpha-DihydroprogesteroneFollicular PhasePregnenoloneProlactinSulfatasesDehydroepiandrosterone3-Hydroxysteroid DehydrogenasesMenstruationOvarian FollicleCattleNorpregnadienesOviductsAndrogensHormonesEstrous CycleSheepLuteolysis20-alpha-Hydroxysteroid DehydrogenaseEstrogens, Conjugated (USP)Administration, IntravaginalEstrogens, CatecholMyometriumOxytocinDehydroepiandrosterone SulfateOrganic Anion Transporters, Sodium-Independent17-alpha-HydroxyprogesteroneDydrogesteroneMenopausePlacenta5-alpha-DihydroprogesteroneProgesteroneGonadotropin-Releasing HormoneAnimals, ZooPostpartum PeriodEstrogen AntagonistsDiestrusSwinePregnancy MaintenancePremenopauseTime FactorsRNA, MessengerAndrosteroneProgesterone-Binding GlobulinMedroxyprogesteronePregnanoloneProgesterone ReductaseEmbryo ImplantationDiethylstilbestrolAnestrusImmunohistochemistryMedroxyprogesterone AcetateProstaglandins FDihydrotestosteroneGonadotropinsAromatase Inhibitors