Fetal DiseasesPrenatal Exposure Delayed EffectsPrenatal DiagnosisPrenatal CarePregnancyUltrasonography, PrenatalInfant, NewbornMaternal ExposureGestational AgeAmniocentesisChorionic Villi SamplingAbortion, EugenicFetusPrenatal InjuriesPregnancy OutcomePregnancy ComplicationsPregnancy Trimester, SecondFetal Alcohol Spectrum DisordersMaternal-Fetal ExchangeFetal DevelopmentGenetic CounselingBirth WeightPregnant WomenPregnancy Trimester, ThirdAbnormalities, MultipleFetal DeathMothersMaternal AgeMaternal BehaviorAbortion, TherapeuticHeterozygote DetectionCongenital AbnormalitiesInfant, Low Birth WeightDown SyndromeAbortion, InducedMaternal-Fetal RelationsPregnancy Trimester, FirstPrenatal EducationChromosome DisordersPregnancy TrimestersGenetic TestingChild DevelopmentTrisomySeychellesPolyhydramniosPregnancy Complications, InfectiousMethylmercury CompoundsHydrops FetalisFetal BloodTestosterone PropionateFetal Nutrition DisordersPregnancy, High-RiskFetal HeartKaryotypingPerinatologyObstetricsInfant BehaviorFetal Growth RetardationHeart Defects, CongenitalBetamethasoneRisk FactorsAbnormalities, Drug-InducedCohort StudiesCocaineEmbryonic and Fetal DevelopmentPerinatal CareEthanolEnvironmental PollutantsMaternal Nutritional Physiological PhenomenaTwins, ConjoinedToxoplasmosis, Congenital