Amino Acids, Branched-ChainAmino AcidsDietary SupplementsAmino Acids, EssentialIsoleucineKeto AcidsValineLeucineAmino Acids, SulfurFolic AcidFood, FortifiedDietary ProteinsMaple Syrup Urine DiseaseBed RestParenteral NutritionMethionineTransaminasesHepatic EncephalopathyAnimal FeedAnimal Nutritional Physiological PhenomenaAmmoniaNitrogenVitamin B ComplexDietRandom AllocationFatty Acids, Omega-3Sarcoma, YoshidaNeural Tube DefectsSwineSequence Homology, Amino AcidMuscle, SkeletalAmino Acid SequenceLiverKineticsInsulinDouble-Blind MethodDocosahexaenoic AcidsHomocysteineGlucosePregnancyAmino Acid SubstitutionParenteral Nutrition, TotalMolecular Sequence DataCloning, MolecularPrenatal Nutritional Physiological PhenomenaVitamin B 12VitaminsFish OilsPreconception CareAscorbic AcidEicosapentaenoic AcidProteinsHyperhomocysteinemiaThioctic AcidPlacebosMethylenetetrahydrofolate Dehydrogenase (NAD+)Polymerase Chain ReactionBase SequenceFatty Acids, UnsaturatedMutationHematinicsIronMaternal Nutritional Physiological PhenomenaAmino Acid Transport SystemsLinoleic Acids, ConjugatedZincCattleIron, DietaryFatty AcidsSequence AlignmentFolic Acid DeficiencyMicronutrientsAdministration, OralEscherichia coliVitamin ATetrahydrofolatesNutritional RequirementsBody WeightInfant FormulaPrenatal CareBinding SitesLactationAnemia, Iron-DeficiencyAmino Acid MotifsRNA, MessengerMethylenetetrahydrofolate Reductase (NADPH2)Infant, NewbornMouth AbnormalitiesVitamin B 6Time FactorsAntioxidantsCross-Over StudiesRecombinant ProteinsPeptide FragmentsDNA, ComplementaryProtein ConformationModels, MolecularWeight GainDose-Response Relationship, DrugSequence Homology, Nucleic Acid