Chorionic GonadotropinChorionic Gonadotropin, beta Subunit, HumanGonadotropinsReceptors, LHChoriocarcinomaGlycoprotein Hormones, alpha SubunitLuteinizing HormoneGonadotropins, EquineReceptors, GonadotropinFollicle Stimulating HormoneTrophoblastic NeoplasmsPregnancyLeydig CellsOvulationProgesteroneGonadotropin-Releasing HormoneOvaryTestosteronePregnancy TestsGonadotropins, PituitaryHydatidiform MoleHormonesCorpus LuteumGranulosa CellsUterine NeoplasmsReproductive Control AgentsEstradiolEstriolOvarian FollicleGestational Trophoblastic DiseasePregnancy, EctopicTestisOvulation InductionHormones, Ectopicalpha-FetoproteinsPlacentaPregnancy Trimester, FirstReceptors, FSHTrophoblastsPituitary GlandPlacental LactogenSuperovulationTesticular NeoplasmsPregnancy Tests, ImmunologicLuteinizationPregnancy-Associated Plasma Protein-AInsemination, ArtificialFertility Agents, FemaleGonadal Steroid HormonesMenotropinsHypogonadismLeydig Cell TumorRadioimmunoassayProlactinHypophysectomyImmunoassayFluoroimmunoassayEstrusSteroidsTheca CellsThyroid HormonesFertilization in VitroPituitary Hormones, AnteriorInhibinsThyrotropinImmunoradiometric AssayRNA, MessengerNeoplasms, Germ Cell and EmbryonalLuteal CellsDown SyndromeHormone AntagonistsPregnancy Trimester, SecondAbortifacient Agents, NonsteroidalCorpus Luteum MaintenanceCyclic AMPSexual MaturationPeptide FragmentsHorsesGerminomaLuteinizing Hormone, beta Subunit3-Hydroxysteroid DehydrogenasesAndrostenedione8-Bromo Cyclic Adenosine MonophosphateFollicle Stimulating Hormone, beta SubunitBucladesineSeminomaPrenatal DiagnosisAdrenocorticotropic HormoneEmbryo ImplantationOocytesSwineLuteal PhaseCells, CulturedPregnancy RateCattleBuserelinMolecular Sequence DataLeuprolideParathyroid HormoneEstrus Synchronization