Pregnancy Trimester, FirstAbortion, InducedPregnancyAbortion, SpontaneousDeciduaPregnancy Trimester, SecondPregnancy Trimester, ThirdAbortifacient Agents, NonsteroidalAborted FetusMisoprostolAdministration, IntravaginalPregnancy TrimestersAbortifacient Agents, SteroidalPregnancy ComplicationsGestational AgePregnancy OutcomeUltrasonography, PrenatalTrophoblastsPregnancy, AnimalPregnancy, EctopicChorionic VilliPlacentaPregnancy Complications, CardiovascularPregnancy Complications, NeoplasticCrown-Rump LengthAbnormalities, Drug-InducedPre-EclampsiaPrenatal DiagnosisPregnancy Complications, InfectiousFetal DiseasesPregnancy, MultipleInfant, NewbornPregnancy in DiabeticsPregnancy RatePregnancy, High-RiskPregnancy TestsChorionic Gonadotropin, beta Subunit, HumanPregnancy ProteinsPlacentationFetusFetal DeathMaternal-Fetal ExchangePrenatal CareAbortion, HabitualMaternal AgeDown SyndromeChorionic Villi SamplingProspective StudiesPrenatal Exposure Delayed EffectsAbortion, MissedFetal DevelopmentPregnancy-Associated Plasma Protein-ANuchal Translucency MeasurementPregnancy in AdolescencePregnancy, TubalFetal Growth RetardationAmniotic FluidUterine HemorrhagePregnancy Complications, HematologicHypertension, Pregnancy-InducedDilatation and CurettageHydatidiform MoleFetal HeartUterusMaternal ExposureAbortion, TherapeuticBirth WeightPregnancy, TwinPremature BirthPlacenta AccretaChorionic GonadotropinParityCongenital AbnormalitiesHeart Rate, FetalPregnancy Complications, ParasiticPregnancy MaintenanceRisk FactorsNeckPregnancy, UnplannedCohort StudiesAbortion, IncompleteAmniocentesisChorionCesarean SectionUrachal CystRetrospective StudiesPregnancy, UnwantedPlacental CirculationFertilization in VitroPregnant WomenPlacenta DiseasesEmbryo ImplantationTwinsEmbryonic and Fetal DevelopmentChoriocarcinomaAbortifacient AgentsChromosome DisordersInfant, Low Birth WeightDiabetes, GestationalMaternal Nutritional Physiological Phenomena