Down SyndromeCongenital AbnormalitiesSyndromePregnancyInfant, NewbornBirth WeightAbnormalities, Drug-InducedChromosomes, Human, Pair 21Maternal AgePrenatal DiagnosisNeural Tube DefectsPremature BirthCleft PalateCleft LipTrisomyHeart Defects, CongenitalBirth CertificatesInfant, Low Birth WeightAbnormalities, MultipleBirth RatePregnancy Trimester, SecondAnencephalyMaternal ExposureMetabolic Syndrome XEstriolFetal DiseasesGestational AgeMusculoskeletal AbnormalitiesPregnancy Trimester, FirstPregnancy OutcomeTeratogensSpinal DysraphismRisk FactorsAmniocentesisCase-Control StudiesCraniofacial AbnormalitiesPaternal AgePhenotypeLimb Deformities, CongenitalHypospadiasMutationPrevalenceLeukemia, Megakaryoblastic, AcutePregnancy ComplicationsRegistriesGastroschisisHeart Septal DefectsHeart Septal Defects, VentricularAbortion, EugenicChromosomes, Human, 21-22 and YFolic AcidNephrotic SyndromeUltrasonography, PrenatalKaryotypingBirth OrderIntellectual DisabilityCardiovascular AbnormalitiesSjogren's SyndromeLive BirthPaternal ExposureTurner SyndromeDisease Models, Animalalpha-FetoproteinsRetrospective StudiesCraniosynostosesPregnancy, High-RiskCohort StudiesHeart Septal Defects, AtrialUnited StatesFetal DeathWestern AustraliaPrenatal Exposure Delayed EffectsMouth AbnormalitiesNasal BonePreconception CareGeorgiaReproductive Techniques, AssistedNuchal Translucency MeasurementChromosome AberrationsNondisjunction, GeneticMothersFetal Alcohol Spectrum DisordersAbortion, InducedHernia, UmbilicalPopulation SurveillanceWilliams SyndromePrenatal CarePedigreeTime FactorsMolecular Sequence DataPalateFetusRiskAbnormalities, Radiation-InducedOdds RatioMyelodysplastic SyndromesSpina Bifida OccultaChorionic Gonadotropin, beta Subunit, HumanUrogenital AbnormalitiesProspective Studies