Maternal AgeGestational AgeUterusInfant, Small for Gestational AgePregnancyInfant, NewbornBirth WeightInfant, PrematurePregnancy OutcomeUltrasonography, PrenatalDown SyndromePremature BirthBirth OrderInfant, Low Birth WeightPregnancy, High-RiskPregnancy ComplicationsPaternal AgePregnancy Trimester, FirstPregnancy Trimester, SecondParityCrown-Rump LengthAmniocentesisFetal Growth RetardationPrenatal DiagnosisInfant, Premature, DiseasesFetusPregnancy Trimester, ThirdFetal DeathInfant MortalityObstetric Labor, PrematureCongenital AbnormalitiesCesarean SectionRisk FactorsFetal DiseasesFetal DevelopmentBirth CertificatesAbortion, SpontaneousInfant, Very Low Birth WeightTwinsStillbirthAmniotic FluidPregnancy, MultipleDelivery, ObstetricPlacentaTrisomyTerm BirthPre-EclampsiaApgar ScoreProspective StudiesCohort StudiesPrenatal CareNuchal Translucency MeasurementIntensive Care Units, NeonatalRetrospective StudiesCervix UteriMothersPerinatal MortalityEmbryo ImplantationPregnancy, AnimalChromosome DisordersNondisjunction, GeneticAneuploidyUterine ContractionFetal MacrosomiaChild DevelopmentChorionic Gonadotropin, beta Subunit, HumanLabor, ObstetricFetal HeartLive BirthGastroschisisPrenatal Exposure Delayed EffectsFetal WeightMaternal ExposurePregnancy-Associated Plasma Protein-AMyometriumEmbryonic and Fetal DevelopmentLogistic ModelsRetinopathy of PrematurityReference ValuesCase-Control StudiesInfant, Newborn, DiseasesPregnancy, TwinHernia, UmbilicalFetal BloodRespiratory Distress Syndrome, NewbornRegression AnalysisObstetric Labor ComplicationsFetal MortalityTripletsHeart Rate, FetalFetal Membranes, Premature RuptureHypertension, Pregnancy-InducedFertilization in VitroDiabetes, GestationalUmbilical ArteriesBody HeightAbortion, InducedLabor, InducedRegistriesGravidity