Folic AcidFolic Acid DeficiencyNeural Tube DefectsTetrahydrofolatesHomocysteineDietary SupplementsFood, FortifiedVitamin B 12Vitamin B ComplexFolic Acid AntagonistsPreconception CareFolate Receptors, GPI-AnchoredHyperhomocysteinemiaAnemia, MacrocyticHematinicsVitamin B 6Pteroylpolyglutamic AcidsVitamin B 12 DeficiencyFolic Acid TransportersPregnancyBreadVitaminsPrenatal CareDouble-Blind MethodFlourFolate Receptor 1Methylenetetrahydrofolate Reductase (NADPH2)Prenatal Nutritional Physiological PhenomenaFormyltetrahydrofolatesAminopterinSpinal DysraphismReduced Folate Carrier ProteinBiological AvailabilityAdministration, OralPterinsMethotrexatePyridoxineCerealsFIGLU TestDietMicronutrientsNutritional RequirementsAnencephalyMethylmalonic AcidHomocystineNutrition Policy4-Aminobenzoic AcidRiboflavinErythrocytesNutritional StatusGlutamatesPlacebosMaternal Nutritional Physiological PhenomenaCleft PalateAnemia, MegaloblasticPregnancy Complications, HematologicMethionineTime FactorsIronAnemia, Iron-DeficiencyVitamin B DeficiencyOxidoreductases Acting on CH-NH Group DonorsDrug Administration ScheduleInfant, NewbornAnemia, Perniciousgamma-Glutamyl HydrolaseIntestinal AbsorptionIron, DietaryCleft LipTreatment OutcomePregnancy ComplicationsLeucovorinKB CellsTrimetrexateIrelandTetrahydrofolate DehydrogenaseLactobacillus caseiDose-Response Relationship, DrugNepalRadiation DosageBetaineLethal Dose 50Methylenetetrahydrofolate Dehydrogenase (NAD+)Congenital AbnormalitiesAnemiaZincHemoglobinsMouth Abnormalities