Estrous CyclePregnancyEstrusPregnancy, AnimalPregnancy OutcomePregnancy ComplicationsProgesteroneCorpus LuteumCell CycleDiestrusUterusPregnancy, EctopicOvaryEstradiolProestrusPregnancy RateOvulationPregnancy Trimester, FirstLuteinizing HormoneEndometriumDinoprostPregnancy Trimester, ThirdOvarian FollicleCattleOvariectomyPregnancy Complications, CardiovascularPregnancy TrimestersPregnancy ProteinsPregnancy TestsPregnancy, MultipleFollicle Stimulating HormoneLuteolysisPregnancy in DiabeticsLuteal PhasePregnancy, TubalPregnancy Trimester, SecondSheepMenstrual CycleEmbryo ImplantationPregnancy Complications, NeoplasticPregnancy in AdolescenceFollicular PhaseEstrus SynchronizationPregnancy Complications, InfectiousGestational AgeAbortion, SpontaneousFallopian TubesFertilityOxytocinTime FactorsReproductionGonadotropin-Releasing HormoneAnestrusPregnancy, UnplannedPregnancy, High-RiskRNA, MessengerMyometriumLuteal CellsPregnancy, UnwantedPregnancy MaintenanceSwinePseudopregnancyPlacentaInsemination, ArtificialVaginaInhibinsEmbryo TransferChorionic GonadotropinPregnancy Complications, HematologicRadioimmunoassayGenitalia, FemaleEstrus DetectionFertilization in VitroLactationInfant, NewbornPregnancy, TwinEstrogensPregnancy, ProlongedPre-EclampsiaAbortion, InducedSexual MaturationCell Cycle ProteinsFetal DeathImmunohistochemistryProstaglandins FFollicular AtresiaParityDeciduaPostpartum PeriodGonadal Steroid HormonesPrenatal Exposure Delayed EffectsPregnancy, AbdominalAbortifacient AgentsInfertility, FemalePregnancy Complications, ParasiticSuperovulationGonadotropinsProlactinUltrasonography, PrenatalCorpus Luteum Maintenance