GonadotrophsPituitary Gland, AnteriorGonadotropin-Releasing HormonePituitary GlandThyrotrophsReceptors, LHRHLuteinizing HormoneLuteinizing Hormone, beta SubunitCatfishesGonadotropins, PituitaryFollicle Stimulating Hormone, beta SubunitPituitary Adenylate Cyclase-Activating PolypeptideFollicle Stimulating HormoneGonadotropinsGlycoprotein Hormones, alpha SubunitPituitary Hormones, AnteriorSomatotrophsBuserelinCorticotrophsPituitary HormonesOvariectomyAnestrusEstradiolNeuropeptidesProlactinOrchiectomyInositol 1,4,5-TrisphosphateCells, CulturedCalciumPituitary Hormone-Releasing HormonesOscillometrySheepEstrusRats, Sprague-DawleyHorsesKisspeptinsCytoplasmic GranulesRNA, MessengerTime FactorsExocytosisSeasonsGrowth HormoneHormone AntagonistsImmunohistochemistryCalcium ChannelsCyclic AMPOvulation InductionKineticsMembrane PotentialsTriptorelin PamoateHypothalamusCalcium SignalingRats, Inbred StrainsDose-Response Relationship, DrugGene Expression RegulationSignal TransductionCell CountElectrophysiologyFertility Agents, FemaleProgesteroneCell MembraneHypogonadismOvulationPregnancy RateEstrus SynchronizationTestosteroneOvaryMedian EminenceInsemination, ArtificialLuteal Phase