Luteinizing HormoneOvulationGonadotropin-Releasing HormoneProgesteroneEstradiolEstrusProestrusFollicular PhaseFollicle Stimulating HormoneReceptors, LHOvariectomyOvarian FollicleMethallibureOvaryEstrous CycleOvulation DetectionLuteal PhaseSecretory RateLuteinizationPreoptic AreaSheepPituitary GlandKisspeptinsChorionic GonadotropinGonadotropins, EquineGonadotropins, PituitaryHormone AntagonistsOvulation InductionSexual MaturationPituitary Hormone-Releasing HormonesAnestrusDrug ImplantsHypothalamusGranulosa CellsDiestrusProlactinInhibinsFollicular FluidSuperovulationPregnancyCastrationRadioimmunoassayCorpus LuteumFeedbackCattleMenstrual CycleCopulationCircadian RhythmMedian EminenceFertility AgentsEstrus SynchronizationLuteolytic AgentsFeedback, PhysiologicalHypothalamus, MiddleTime FactorsTriptorelin PamoateTheca CellsInsemination, ArtificialCloprostenolGonadotropinsTestosteroneFertility Agents, FemalePituitary Gland, AnteriorAndrostenedioneDinoprostGonadal HormonesReceptors, LHRHGonadal Steroid HormonesContraceptives, Postcoital, SyntheticEstrogensMifepristoneSexual Behavior, AnimalPostpartum PeriodFertilityReproductionProgesterone CongenersProto-Oncogene Proteins c-fosOvipositionGonadotrophsRNA, MessengerHypothalamo-Hypophyseal SystemFertilization in VitroSwineFollicular AtresiaOrchiectomyOvarian CystsSeasonsDeerOxytocinClomiphenePeriodicityRats, Inbred StrainsNeuronsOocytesLactationMesocricetusHormonesInfertility, FemaleNorpregnadienesNaloxone