Folic AcidAscorbic AcidFolic Acid DeficiencyAscorbic Acid DeficiencyNeural Tube DefectsFood, FortifiedTetrahydrofolatesDietary SupplementsHomocysteineVitamin B 12Vitamin B ComplexFolic Acid AntagonistsPreconception CareDehydroascorbic AcidScurvyFolate Receptors, GPI-AnchoredHyperhomocysteinemiaAnemia, MacrocyticHematinicsVitaminsVitamin B 6Pteroylpolyglutamic AcidsAntioxidantsVitamin B 12 DeficiencyFolic Acid TransportersPregnancyBreadL-Gulonolactone OxidasePrenatal CareDietBiological AvailabilityFlourSodium-Coupled Vitamin C TransportersFolate Receptor 1IronMethylenetetrahydrofolate Reductase (NADPH2)Double-Blind MethodPrenatal Nutritional Physiological PhenomenaNutritional RequirementsFormyltetrahydrofolatesSpinal DysraphismCerealsAminopterinPterinsPyridoxineMicronutrientsAscorbate OxidaseReduced Folate Carrier ProteinIron, DietaryDose-Response Relationship, DrugFIGLU TestRiboflavinErythrocytes2,3-Diketogulonic AcidNutritional StatusMethotrexateAnencephalyOxidation-ReductionHomocystineMethylmalonic AcidNutrition PolicyIntestinal Absorption4-Aminobenzoic AcidRats, Mutant StrainsAnemia, Iron-DeficiencyVitamin EChromatography, High Pressure LiquidMethionineGlutamatesGlutathioneAdministration, OralMaternal Nutritional Physiological PhenomenaFree Radical ScavengersCleft PalateAnemia, MegaloblasticLiverPlacebosPregnancy Complications, HematologicTime FactorsFerrous CompoundsPhosphorous AcidsHemoglobinsThiamineLipid PeroxidationFood AnalysisVitamin B DeficiencyOxidoreductases Acting on CH-NH Group DonorsPicratesZincAnemia, Perniciousgamma-Glutamyl HydrolaseCleft LipInfant, NewbornOxidative Stressalpha-TocopherolVitamin AKineticsPteridinesPregnancy ComplicationsKB Cells