Luteinizing HormoneOvulationGonadotropin-Releasing HormoneProgesteroneEstradiolEstrusProestrusFollicular PhaseFollicle Stimulating HormoneReceptors, LHOvariectomyOvarian FollicleMethallibureEstrous CycleOvaryOvulation DetectionLuteal PhaseSecretory RateLuteinizationPreoptic AreaSheepPituitary GlandKisspeptinsChorionic GonadotropinGonadotropins, EquineGonadotropins, PituitaryHormone AntagonistsOvulation InductionSexual MaturationPituitary Hormone-Releasing HormonesAnestrusDrug ImplantsGranulosa CellsHypothalamusDiestrusProlactinInhibinsFollicular FluidSuperovulationPregnancyCastrationCorpus LuteumRadioimmunoassayFeedbackMenstrual CycleCattleCopulationMedian EminenceFertility AgentsCircadian RhythmEstrus SynchronizationLuteolytic AgentsHypothalamus, MiddleFeedback, PhysiologicalTriptorelin PamoateTheca CellsCloprostenolInsemination, ArtificialGonadotropinsTestosteroneFertility Agents, FemalePituitary Gland, AnteriorAndrostenedioneTime FactorsDinoprostGonadal HormonesReceptors, LHRHGonadal Steroid HormonesContraceptives, Postcoital, SyntheticEstrogensMifepristoneSexual Behavior, AnimalPostpartum PeriodProgesterone CongenersGonadotrophsProto-Oncogene Proteins c-fosFertilityOvipositionReproductionHypothalamo-Hypophyseal SystemFollicular AtresiaFertilization in VitroOrchiectomyOvarian CystsSwineDeerOxytocinRNA, MessengerClomipheneSeasonsPeriodicityRats, Inbred StrainsNorpregnadienesLactationHormonesInfertility, FemaleOocytesMesocricetusNaloxoneNeurons