Prenatal DiagnosisFetal DiseasesUltrasonography, PrenatalPregnancyPrenatal Exposure Delayed EffectsChorionic Villi SamplingAmniocentesisPrenatal CareAbortion, EugenicHeterozygote DetectionGenetic CounselingAbnormalities, MultipleInfant, NewbornAbortion, TherapeuticAmniotic FluidGestational AgePregnancy Trimester, SecondChromosome DisordersAbortion, InducedFetusKaryotypingTrisomyPregnancy OutcomeThalassemiaCongenital AbnormalitiesDown SyndromeGenetic TestingPregnancy Trimester, FirstCordocentesisHydrops FetalisChromosome AberrationsFetal DeathSensitivity and SpecificityPedigreeHeart Defects, CongenitalSex Chromosome DisordersHemoglobinopathiesPolyhydramniosSyndromeRetrospective StudiesPregnancy Trimester, ThirdSex Chromosome AberrationsPreimplantation DiagnosisAneuploidyHernia, UmbilicalUltrasonography, Doppler, ColorEctromeliaPolymerase Chain ReactionFetal Heartbeta-ThalassemiaSex Determination AnalysisPregnant WomenGenetic Diseases, InbornChorionic VilliMusculoskeletal AbnormalitiesTwins, ConjoinedChromosomes, Human, Pair 18Magnetic Resonance ImagingFatal OutcomeDelayed DiagnosisPrenatal InjuriesFetoscopyMosaicismChromosomes, Human, Pair 13Early DiagnosisDandy-Walker SyndromeHydrocolposGenetic LinkageMutationMaternal AgeGastroschisisPulmonary AtresiaLevocardiaAgenesis of Corpus CallosumProspective StudiesAnus, ImperforateAdrenal Hyperplasia, CongenitalGenetic MarkersFetomaternal TransfusionGenetic ServicesMuscular DystrophiesDNADNA Mutational AnalysisIn Situ Hybridization, FluorescenceHeterozygoteEchocardiography, Four-DimensionalHernia, DiaphragmaticOligohydramniosPregnancy, High-RiskAnencephalySpinal Muscular Atrophies of ChildhoodReproducibility of ResultsUrogenital AbnormalitiesRisk FactorsNeural Tube DefectsPolymorphism, Restriction Fragment LengthPregnancy ComplicationsMaternal ExposureHydronephrosisSpinal Dysraphism