AntimetabolitesFolic AcidAntimetabolites, AntineoplasticFolic Acid DeficiencyTetrahydrouridineFloxuridineFolic Acid AntagonistsNeural Tube DefectsTrabeculectomyInosine MonophosphateTetrahydrofolatesPhosphoribosyl PyrophosphateMethotrexateHomocysteineFood, FortifiedDietary SupplementsVitamin B 12Vitamin B ComplexFluorouracilLeukemia L1210MitomycinPreconception Care6-MercaptopurineCytarabinePurinesFolate Receptors, GPI-AnchoredHyperhomocysteinemiaAntineoplastic AgentsDrug SynergismAnemia, MacrocyticHematinicsVitamin B 6Drug Screening Assays, AntitumorDeoxycytidinePteroylpolyglutamic AcidsVitamin B 12 DeficiencyFolic Acid TransportersCell SurvivalDrug Evaluation, PreclinicalPregnancyNeoplasmsBreadTumor Cells, CulturedVitaminsPrenatal CareCell DivisionCell CycleFlourFolate Receptor 1Methylenetetrahydrofolate Reductase (NADPH2)Cell LinePrenatal Nutritional Physiological PhenomenaFormyltetrahydrofolatesSpinal DysraphismKineticsAminopterinDouble-Blind MethodReduced Folate Carrier ProteinPterinsFIGLU TestPyridoxineCerealsMicronutrientsDietAnencephalyNutritional RequirementsHomocystineMethylmalonic AcidNutrition Policy4-Aminobenzoic AcidRiboflavinBiological AvailabilityErythrocytesNutritional StatusGlutamatesMaternal Nutritional Physiological PhenomenaCleft PalateAnemia, MegaloblasticPregnancy Complications, HematologicMethionine