AnestrusPregnancyEstrusPregnancy OutcomePregnancy ComplicationsPregnancy, AnimalLuteinizing HormoneSeasonsProgesteroneSheepPregnancy, EctopicPregnancy Trimester, FirstPituitary Hormone-Releasing HormonesPregnancy RatePregnancy Trimester, ThirdEstradiolPregnancy Complications, CardiovascularPregnancy TrimestersPregnancy TestsBuffaloesPregnancy, MultipleOvulationPostpartum PeriodBreedingPregnancy in DiabeticsFollicle Stimulating HormonePregnancy, TubalPregnancy Trimester, SecondLactationReproductionPregnancy Complications, NeoplasticGonadotropin-Releasing HormonePregnancy in AdolescenceCorpus LuteumOvaryPregnancy Complications, InfectiousDeerOvarian FollicleProlactinFertilityAbortion, SpontaneousOvariectomySecretory RateEstrus DetectionPregnancy ProteinsPregnancy, UnplannedPregnancy, High-RiskLuteal PhaseEstrous CycleGonadotropins, EquinePregnancy, UnwantedGestational AgePregnancy Complications, HematologicInfertility, FemaleOvulation InductionChorionic GonadotropinPeriodicityDrug ImplantsPregnancy, ProlongedInfant, NewbornPre-EclampsiaPregnancy, TwinCattlePlacentaGonadotropins, PituitaryFetal DeathSexual MaturationBromocriptineInfusion Pumps, ImplantableAbortion, InducedAnimal Nutritional Physiological PhenomenaPregnancy, AbdominalUterusCastrationPregnancy Complications, ParasiticPregnancy MaintenanceUltrasonography, PrenatalEmbryo ImplantationLitter SizeFood DeprivationBody WeightEmbryo TransferPrenatal CareTime FactorsFertilization in VitroEstrus SynchronizationRadioimmunoassayPituitary GlandMaternal-Fetal ExchangeParityPrenatal Exposure Delayed EffectsBirth WeightPhotoperiodSexual Behavior, AnimalRandom AllocationDinoprostMelatoninPregnancy Reduction, MultifetalHorses