1Bailey LB & Gregory JF III (1999) Folate metabolism and requirements. J Nutr 129, 779–782.
2Anonymous (1991) Prevention of neural tube defects: results of the Medical Research Council Vitamin Study. MRC Vitamin Study Research Group. Lancet 338, 131–137.
4Iyengar L & Rajalakshmi K (1975) Effect of folic acid supplement on birth weights of infants. Am J Obstet Gynecol 122, 332–336.
5Craciunescu CN, Brown EC, Mar MH, et al. (2004) Folic acid deficiency during late gestation decreases progenitor cell proliferation and increases apoptosis in fetal mouse brain. J Nutr 134, 162–166.
6Xiao S, Hansen DK, Horsley ET, et al. (2005) Maternal folate deficiency results in selective upregulation of folate receptors and heterogeneous nuclear ribonucleoprotein-E1 associated with multiple subtle aberrations in fetal tissues. Birth Defects Res A Clin Mol Teratol 73, 6–28.
7Zammit S, Lewis S, Gunnell D, et al. (2007) Schizophrenia and neural tube defects: comparisons from an epidemiological perspective. Schizophr Bull 33, 853–858.
8Brown AS, Bottiglieri T, Schaefer CA, et al. (2007) Elevated prenatal homocysteine levels as a risk factor for schizophrenia. Arch Gen Psychiatry 64, 31–39.
9Erbe RE (1975) Inborn errors of folate metabolism (first of two parts). N Engl J Med 293, 753–757.
10Erbe RW (1975) Inborn errors of folate metabolism (second of two parts). N Engl J Med 293, 807–812.
11Tamura T, Goldenberg RL, Chapman VR, et al. (2005) Folate status of mothers during pregnancy and mental and psychomotor development of their children at five years of age. Pediatrics 116, 703–708.
12Jaddoe VW, Mackenbach JP, Moll HA, et al. (2006) The Generation R Study: design and cohort profile. Eur J Epidemiol 21, 475–484.
13Achenbach TM & Rescorla LA (2000) Manual for the ASEBA Preschool Forms and Profiles. Burlington, VT: University of Vermont, Research Center for Children, Youth, and Families.
14Tick NT, van der Ende J, Koot HM, et al. (2007) 14-Year changes in emotional and behavioural problems of very young Dutch children. J Am Acad Child Adolesc Psychiatry 46, 1333–1340.
15Reichenberg A, Gross R, Weiser M, et al. (2006) Advancing paternal age and autism. Arch Gen Psychiatry 63, 1026–1032.
16Malaspina D, Harlap S, Fennig S, et al. (2001) Advancing paternal age and the risk of schizophrenia. Arch Gen Psychiatry 58, 361–367.
17de Beurs E (2004) Brief Symptom Inventory. Leiden, The Netherlands: Pits Publishers.
18Derogatis LR & Melisaratos N (1983) The Brief Symptom Inventory: an introductory report. Psychol Med 13, 595–605.
19Timmermans S, Jaddoe VW, Mackenbach JP, et al. (2008) Determinants of folic acid use in early pregnancy in a multi-ethnic urban population in the Netherlands: The Generation R Study. Prev Med .
20Greenblatt JM, Huffman LC & Reiss AL (1994) Folic acid in neurodevelopment and child psychiatry. Prog Neuropsychopharmacol Biol Psychiatry 18, 647–660.
21Brown AS, Susser ES, Butler PD, et al. (1996) Neurobiological plausibility of prenatal nutritional deprivation as a risk factor for schizophrenia. J Nerv Ment Dis 184, 71–85.
22Fernstrom JD (2000) Can nutrient supplements modify brain function? Am J Clin Nutr 71, Suppl. 6, 1669S–1675S.
23Scholl TO & Johnson WG (2000) Folic acid: influence on the outcome of pregnancy. Am J Clin Nutr 71, Suppl. 5, 1295S–1303S.
24Tamura T & Picciano MF (2006) Folate and human reproduction. Am J Clin Nutr 83, 993–1016.
25Kelly YJ, Nazroo JY, McMunn A, et al. (2001) Birthweight and behavioural problems in children: a modifiable effect? Int J Epidemiol 30, 88–94.
26McClellan JM, Susser E & King M (2006) Maternal famine, de novo mutations, and schizophrenia. JAMA 296, 582–584.
27Wolff GL, Kodell RL, Moore SR, et al. (1998) Maternal epigenetics and methyl supplements affect agouti gene expression in Avy/a mice. FASEB J 12, 949–957.
28Brantsaeter AL, Haugen M, Hagve TA, et al. (2007) Self-reported dietary supplement use is confirmed by biological markers in the Norwegian Mother and Child Cohort Study (MoBa). Ann Nutr Metab 51, 146–154.