Corpus Luteum MaintenanceCorpus LuteumLuteolysisProgesteroneCorpus Luteum HormonesLuteal CellsLuteal PhaseCorpus CallosumDinoprostPseudopregnancyEmbryo, MammalianPregnancyEstrusEstrous CycleEmbryo, NonmammalianOvaryAgenesis of Corpus CallosumPregnancy, AnimalChorionic GonadotropinChick EmbryoEmbryo ImplantationCattleOvarian FollicleOvulationLuteinizing HormoneMenstrual CycleLuteolytic AgentsEstradiolOxytocinGranulosa Cells3-Hydroxysteroid DehydrogenasesRNA, MessengerSheepMacropodidaeBlastocystEmbryonic DevelopmentRelaxinUterusDiestrusTheca CellsCholesterol Side-Chain Cleavage EnzymeEmbryo Implantation, DelayedReceptors, LHMarsupialiaProstaglandins FImmunohistochemistryCloprostenolLuteinizationProlactinPregnancy Maintenance