Chorionic GonadotropinChorionic Gonadotropin, beta Subunit, HumanGonadotropinsReceptors, LHGonadotropins, EquineReceptors, GonadotropinChoriocarcinomaGlycoprotein Hormones, alpha SubunitLuteinizing HormoneGonadotropins, PituitaryFollicle Stimulating HormonePregnancyOvulationOvaryProgesteroneGonadotropin-Releasing HormoneLeydig CellsTrophoblastic NeoplasmsTestosteronePregnancy TestsOvarian FollicleCorpus LuteumGranulosa CellsHydatidiform MoleEstradiolPregnancy-Associated Plasma Protein-APregnancy Trimester, FirstOvulation InductionPregnancy, EctopicReceptors, FSHTestisPituitary GlandUterine NeoplasmsReproductive Control AgentsEstriolHormones, EctopicPlacentaalpha-FetoproteinsGestational Trophoblastic DiseaseSuperovulationLuteinizing Hormone, beta SubunitTrophoblastsHypogonadismPlacental LactogenFertility Agents, FemaleMenotropinsFollicle Stimulating Hormone, beta SubunitHorsesInsemination, ArtificialLuteinizationNuchal Translucency MeasurementEstrusTesticular NeoplasmsInhibinsDown SyndromeSexual MaturationTheca CellsRadioimmunoassayFertilization in VitroPregnancy Tests, ImmunologicLeydig Cell TumorSteroidsProlactinFluoroimmunoassayHypophysectomyAbortifacient Agents, NonsteroidalPrenatal DiagnosisImmunoassayPerissodactylaPregnancy Trimester, SecondRNA, MessengerLeuprolideNeoplasms, Germ Cell and EmbryonalLuteal CellsPituitary Hormone-Releasing HormonesAndrostenedioneEmbryo Implantation3-Hydroxysteroid DehydrogenasesGerminomaFollicular PhaseOocytesCyclic AMPPregnancy RatePregnancy, TubalImmunoradiometric AssayHormone AntagonistsPeptide FragmentsEstrus Synchronization8-Bromo Cyclic Adenosine MonophosphateCorpus Luteum MaintenanceLuteal PhaseSeminomaBiological AssaySwineThyrotropinReceptors, LHRHHormonesInfertility, FemalePuberty, PrecociousBucladesine