Fetal DiseasesPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy Trimester, SecondPregnancy TrimestersPregnancyUltrasonography, PrenatalPregnancy ComplicationsGestational AgePregnancy OutcomeTrophoblastsPlacentaAbortion, SpontaneousChorionic VilliPrenatal DiagnosisPre-EclampsiaAbortion, InducedCrown-Rump LengthInfant, NewbornPregnancy Complications, InfectiousDeciduaFetusFetal DevelopmentAmniotic FluidAbnormalities, Drug-InducedPregnancy Complications, NeoplasticPregnancy Complications, CardiovascularDown SyndromeFetal Growth RetardationPostpartum PeriodAbortifacient Agents, NonsteroidalMisoprostolMaternal-Fetal ExchangeMaternal ExposureFetal HeartBirth WeightPrenatal CareChorionic Gonadotropin, beta Subunit, HumanFetal DeathPlacentationPrenatal Exposure Delayed EffectsProspective StudiesAmniocentesisMaternal AgePregnancy in DiabeticsChorionic Villi SamplingDilatation and CurettageNuchal Translucency MeasurementPregnancy-Associated Plasma Protein-APremature BirthHypertension, Pregnancy-InducedAbortifacient AgentsAbortion, MissedPregnancy, High-RiskAbortion, HabitualUterine HemorrhagePregnancy Complications, HematologicHeart Rate, FetalAbortifacient Agents, SteroidalPlacental CirculationAbortion, TherapeuticPregnancy ProteinsEmbryonic and Fetal DevelopmentParityUrachal CystPlacenta AccretaHydatidiform MoleInfant, Small for Gestational AgeObstetric Labor, PrematureFetal MovementCongenital AbnormalitiesUterine ArteryNeckChorionDiabetes, GestationalInfant, Low Birth WeightTrisomyCesarean SectionMaternal Nutritional Physiological PhenomenaUterusMeconiumCohort StudiesPregnancy, MultipleOligohydramniosChromosome DisordersPlacenta DiseasesChorionic GonadotropinUmbilical ArteriesPregnancy Complications, ParasiticChoriocarcinomaFetal BloodNasal BonePregnant WomenAdministration, IntravaginalReference ValuesAbortion, IncompleteAmnionPregnancy, EctopicAborted FetusUltrasonography, Doppler