PregnancyAbortion, SpontaneousAbortion, HabitualPregnancy OutcomePregnancy ComplicationsPregnancy Trimester, FirstPregnancy, AnimalAbortion, ThreatenedPregnancy, EctopicPregnancy RateAbortion, IncompletePregnancy Trimester, ThirdPregnancy Complications, CardiovascularAbortion, MissedPregnancy, MultiplePregnancy TrimestersPregnancy Trimester, SecondPregnancy, TubalPregnancy TestsPregnancy Complications, NeoplasticPregnancy Complications, InfectiousPregnancy in DiabeticsGestational AgeAbortion, InducedFetal DeathPregnancy, High-RiskDilatation and CurettageGestational SacMaternal AgeLive BirthPregnancy in AdolescenceInfertility, FemalePregnancy ProteinsFertilization in VitroEmbryo ImplantationPregnancy Complications, HematologicInfant, NewbornHistocompatibility, Maternal-FetalUterusUltrasonography, PrenatalPlacentaEmbryo TransferPregnancy, UnplannedPregnancy, UnwantedStillbirthPre-EclampsiaAbortifacient Agents, NonsteroidalChorionic VilliPrenatal CareUterine HemorrhageParityDeciduaCongenital AbnormalitiesCrown-Rump LengthTrophoblastsAbortion, TherapeuticPregnancy Reduction, MultifetalReproductive Techniques, AssistedEndometriumPregnancy, ProlongedPregnancy, TwinPremature BirthMaternal-Fetal ExchangePregnancy Complications, ParasiticSperm Injections, IntracytoplasmicInfertilityAbnormalities, Drug-InducedProspective StudiesMisoprostolObstetric Labor, PrematureBirth RateRisk FactorsChorionic GonadotropinReceptors, Interleukin-8Pregnancy, AbdominalPregnancy MaintenanceAntibodies, AntiphospholipidBirth WeightReproductive HistoryPrenatal DiagnosisCase-Control StudiesVacuum CurettageFetal Growth RetardationKaryotypingCesarean SectionAntiphospholipid SyndromeRetrospective StudiesPlacenta DiseasesProgesteroneFertilityPlacentationChorionic Gonadotropin, beta Subunit, HumanChromosome AberrationsOvulation InductionPreimplantation DiagnosisPreconception CareHydatidiform MoleCohort StudiesFetusPrenatal Exposure Delayed Effects