Truncus Arteriosus, PersistentHeart Defects, CongenitalDiGeorge SyndromeTruncus ArteriosusChromosomes, Human, Pair 22Tetralogy of FallotPulmonary AtresiaVelopharyngeal InsufficiencyAbnormalities, MultipleDouble Outlet Right VentricleEndocardial Cushion DefectsAbortion, EugenicHeart Septal Defects, VentricularHeart Septal DefectsNeural CrestChromosome DeletionHeartCardiovascular AbnormalitiesEchocardiography, Four-DimensionalAortopulmonary Septal DefectTransposition of Great VesselsCleft PalateSyndromeFaciesFetal HeartCleft LipChick EmbryoUltrasonography, PrenatalFolic AcidPregnancyFaceCaliforniaMethylenetetrahydrofolate Reductase (NADPH2)Ventricular FunctionIn Situ Hybridization, FluorescenceInfant, NewbornMorphogenesisHeart VentriclesPhenotypeKaryotypingCase-Control StudiesMyocardiumGenotypeRisk Factors