Placental HormonesPlacental LactogenPlacentaChorionic GonadotropinTrophoblastsPregnancyGene Expression ProfilingGene ExpressionGene Expression RegulationHormonesLuteinizing HormoneEstradiolFollicle Stimulating HormoneRNA, MessengerOligonucleotide Array Sequence AnalysisThyroid HormonesGonadal Steroid HormonesGonadotropin-Releasing HormoneCorpus LuteumProgesterone CongenersProgestinsMifepristoneTranscription, GeneticGene Expression Regulation, DevelopmentalEstrusReverse Transcriptase Polymerase Chain ReactionOvariectomyPromoter Regions, GeneticParathyroid HormoneBase SequenceMolecular Sequence DataOvaryHormone AntagonistsUterusEstrogensTranscription FactorsGene Expression Regulation, NeoplasticReceptors, EstrogenCells, CulturedLuteal PhaseOvulationAdrenocorticotropic HormoneProlactinGene Expression Regulation, EnzymologicPregnancy, Animal