PregnancyPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy Trimester, SecondPregnancy TrimestersPregnancy ComplicationsPregnancy OutcomePregnancy, AnimalHormonesPregnancy, EctopicPregnancy Complications, CardiovascularThyroid HormonesGestational AgeFollicle Stimulating HormonePregnancy RateUltrasonography, PrenatalAbortion, SpontaneousPregnancy Complications, NeoplasticPregnancy in DiabeticsPregnancy, MultipleLuteinizing HormonePregnancy Complications, InfectiousPregnancy TestsPlacentaPregnancy, TubalPre-EclampsiaInfant, NewbornGonadotropin-Releasing HormoneParathyroid HormonePregnancy ProteinsPregnancy in AdolescenceGonadal Steroid HormonesPregnancy, High-RiskAbortion, InducedTrophoblastsPregnancy Complications, HematologicFetal DeathFetal DiseasesPrenatal DiagnosisPregnancy, UnplannedFetusUterusMaternal-Fetal ExchangeReceptors, Thyroid HormoneHuman Growth HormonePrenatal CareProgesteroneDeciduaPregnancy, UnwantedChorionic VilliAdrenocorticotropic HormonePrenatal Exposure Delayed EffectsFetal Growth RetardationFetal DevelopmentAbnormalities, Drug-InducedBirth WeightPregnancy, TwinChorionic GonadotropinPregnancy Complications, ParasiticPituitary HormonesAmniotic FluidMaternal AgeEstradiolAbortifacient Agents, NonsteroidalProspective StudiesMaternal ExposureParityHypertension, Pregnancy-InducedCrown-Rump LengthPremature BirthPregnancy, ProlongedTriiodothyronineFertilization in VitroPregnancy MaintenanceChorionic Gonadotropin, beta Subunit, HumanEmbryo ImplantationPregnancy, AbdominalCesarean SectionEmbryo TransferAbortion, HabitualProlactinObstetric Labor, PrematureAbortion, TherapeuticCongenital AbnormalitiesJuvenile HormonesThyroxinePlacentationDown SyndromeHormone Replacement TherapyTime FactorsLabor, ObstetricLactationRisk FactorsDiabetes, GestationalMisoprostolThyrotropinCohort StudiesTwinsUterine HemorrhageAbortifacient Agents