Maternal AgeGestational AgeInfant, Small for Gestational AgePregnancyInfant, NewbornBirth WeightInfant, PrematurePregnancy OutcomeUltrasonography, PrenatalDown SyndromePremature BirthBirth OrderInfant, Low Birth WeightPaternal AgePregnancy, High-RiskPregnancy ComplicationsPregnancy Trimester, FirstPregnancy Trimester, SecondParityCrown-Rump LengthAmniocentesisFetal Growth RetardationPrenatal DiagnosisInfant, Premature, DiseasesPregnancy Trimester, ThirdInfant MortalityRisk FactorsFetal DeathFetusObstetric Labor, PrematureCongenital AbnormalitiesBirth CertificatesFetal DiseasesFetal DevelopmentCesarean SectionAbortion, SpontaneousInfant, Very Low Birth WeightTwinsStillbirthProspective StudiesCohort StudiesTrisomyPregnancy, MultipleTerm BirthDelivery, ObstetricApgar ScoreAmniotic FluidRetrospective StudiesPrenatal CarePre-EclampsiaNuchal Translucency MeasurementIntensive Care Units, NeonatalMothersPerinatal MortalityChromosome DisordersAneuploidyNondisjunction, GeneticChild DevelopmentFetal MacrosomiaPlacentaChorionic Gonadotropin, beta Subunit, HumanFetal HeartGastroschisisLive BirthRegression AnalysisPrenatal Exposure Delayed EffectsReference ValuesLogistic ModelsCase-Control StudiesPregnancy-Associated Plasma Protein-AMaternal ExposureFetal WeightRetinopathy of PrematurityInfant, Newborn, DiseasesFetal BloodRespiratory Distress Syndrome, NewbornPregnancy, TwinHernia, UmbilicalTripletsFetal MortalityBody HeightFetal Membranes, Premature RuptureHeart Rate, FetalDiabetes, GestationalHypertension, Pregnancy-InducedUmbilical ArteriesObstetric Labor ComplicationsFertilization in VitroEmbryonic and Fetal DevelopmentRegistriesOdds RatioBronchopulmonary DysplasiaPregnancy in DiabeticsDevelopmental DisabilitiesPerinatal CareIntensive Care, NeonatalLabor, InducedAbortion, InducedPregnancy TrimestersSocioeconomic Factors