Folic AcidFolic Acid DeficiencyVitamin AVitamin B 12VitaminsVitamin DVitamin ENeural Tube DefectsDietary SupplementsVitamin A DeficiencyHomocysteineVitamin B 6Food, FortifiedTetrahydrofolatesVitamin B 12 DeficiencyVitamin D DeficiencyVitamin B ComplexFolic Acid AntagonistsPreconception CareVitamin K 1HyperhomocysteinemiaVitamin E DeficiencyFolate Receptors, GPI-AnchoredAnemia, MacrocyticPyridoxineVitamin B 6 DeficiencyAscorbic AcidHematinicsVitamin K DeficiencyPregnancyPteroylpolyglutamic AcidsCholecalciferolFolic Acid TransportersBreadDietPrenatal CareVitamin B DeficiencyDouble-Blind MethodNutritional RequirementsNutritional StatusFlourMethylmalonic AcidMethylenetetrahydrofolate Reductase (NADPH2)Receptors, CalcitriolVitamin D-Binding ProteinFolate Receptor 1MicronutrientsRiboflavinPrenatal Nutritional Physiological PhenomenaNutrition PolicyFormyltetrahydrofolatesSpinal DysraphismVitamin K 2AminopterinBiological AvailabilityCerealsCalcifediolReduced Folate Carrier ProteinFIGLU TestCalcitriolPterinsHomocystineErythrocytesAntioxidantsAvitaminosisMethotrexateMaternal Nutritional Physiological PhenomenaAnencephaly4-Aminobenzoic AcidAnemia, MegaloblasticAnemia, PerniciousErgocalciferolsbeta CaroteneDose-Response Relationship, DrugAdministration, OralIntestinal AbsorptionPlacebosMethionineVitamin K 3ThiamineGlutamatesIronTranscobalaminsInfant, NewbornVitamin K Deficiency BleedingPregnancy ComplicationsAnemia, Iron-DeficiencyPregnancy Complications, HematologicCleft PalateIron, DietaryRisk FactorsRicketsSunlightOxidoreductases Acting on CH-NH Group DonorsNepalalpha-TocopherolZincLiverNutrition SurveysCleft Lip