GonadotropinsChorionic GonadotropinPregnancyChorionic Gonadotropin, beta Subunit, HumanPregnancy OutcomePregnancy ComplicationsReceptors, GonadotropinPregnancy, AnimalGonadotropins, PituitaryGonadotropins, EquinePregnancy, EctopicLuteinizing HormoneFollicle Stimulating HormonePregnancy Trimester, FirstPregnancy RatePregnancy TestsGonadotropin-Releasing HormonePregnancy Trimester, ThirdReceptors, LHPregnancy Complications, CardiovascularPregnancy, MultiplePregnancy TrimestersProgesteronePregnancy Trimester, SecondPregnancy, TubalOvaryOvulationPregnancy in DiabeticsGlycoprotein Hormones, alpha SubunitEstradiolPregnancy Complications, NeoplasticPregnancy in AdolescencePituitary GlandOvarian FollicleAbortion, SpontaneousPregnancy Complications, InfectiousFollicle Stimulating Hormone, beta SubunitTestosteronePregnancy ProteinsPlacentaPregnancy, High-RiskOvulation InductionGestational AgeFertilization in VitroLuteinizing Hormone, beta SubunitPregnancy, UnplannedPregnancy, UnwantedReceptors, FSHChoriocarcinomaCorpus LuteumUterusEmbryo TransferGranulosa CellsPregnancy Complications, HematologicEstrusEmbryo ImplantationHypogonadismPre-EclampsiaInfant, NewbornPituitary Hormone-Releasing HormonesFetal DeathPregnancy, ProlongedTestisPregnancy, TwinInfertility, FemaleFertility Agents, FemaleLeydig CellsSexual MaturationMenotropinsInhibinsUltrasonography, PrenatalInsemination, ArtificialReceptors, LHRHAbortion, InducedSuperovulationGonadotrophsProlactinPregnancy, AbdominalTrophoblastsPregnancy Complications, ParasiticPituitary Gland, AnteriorHydatidiform MolePregnancy MaintenanceMaternal-Fetal ExchangeFollicular PhaseProestrusTrophoblastic NeoplasmsFertilityParityMaternal AgePrenatal CarePrenatal Exposure Delayed EffectsLeuprolideInfertilityPrenatal DiagnosisRadioimmunoassayLactationOvariectomyAbortifacient Agents, NonsteroidalEstrous Cycle