1.Moore, V, Davies, M, Willson, K, Worsley, A & Robinson, JS (2004) Dietary composition of pregnant women is related to size of the baby at birth. J Nutr 134, 1820–1826.
2.Harding, J (2001) The nutritional basis of the fetal origins of adult disease. Int J Epidemiol 30, 15–23.
3.Kind, K, Moore, V & Davies, M (2006) Diet around conception and during pregnancy – effects on fetal and neonatal outcomes. Reprod Biomed Online 12, 532–541.
4.Olafsdottir, A, Skuladottir, G, Thorsdottir, I, Hauksson, A, Thorgeirsdottir, H & Steingrimsdottir, L (2006) Relationship between high consumption of marine fatty acids in early pregnancy and hypertensive disorders in pregnancy. BJOG 113, 301–309.
5.Moore, V & Davies, M (2005) Diet during pregnancy, neonatal outcomes and later health. Reprod Fertil Dev 17, 341–348.
6.Fowles, E (2004) Prenatal nutrition and birth outcomes. J Obstet Gynecol Neonatal Nurs 33, 809–822.
7.Luke, B (2005) The evidence linking maternal nutrition and prematurity. J Perinat Med 33, 500–505.
8.Godfrey, K, Robinson, S, Barker, D, Osmond, C & Cox, V (1996) Maternal nutrition in early and late pregnancy in relation to placental and fetal growth. BMJ 312, 410–414.
9.Olsen, S, Sorensen, J, Secher, N, Hedegaard, M, Henriksen, T, Hansen, H & Grant, A (1992) Randomised controlled trial of effect of fish-oil supplementation on pregnancy duration. Lancet 339, 1003–1007.
10.Worthington-Roberts, B (1997) The role of maternal nutrition in the prevention of birth defects. J Am Diet Assoc 97, S184–S185.
11.Barker, D (1998) Mothers, Babies and Health in Later Life. Edinburgh: Churchill Livingstone.
12.Frederick, I, Williams, M, Dashow, E, Kestin, M, Zhang, C & Leisenring, W (2005) Dietary fiber, potassium, magnesium and calcium in relation to the risk of preeclampsia. J Reprod Med 50, 332–344.
13.Siega-Riz, A, Evenson, K & Dole, N (2004) Pregnancy-related weight gain – a link to obesity? Nutr Rev 62, S105–S111.
14.Teles, T, Rodrigues, T & Barros, H (1994) [Maternal anthropometric characteristics. Risk of intrauterine growth retardation]. Acta Med Port 7, 669–675.
15.Lumley, J, Watson, L, Watson, M & Bower, C (2001) Periconceptional supplementation with folate and/or multivitamins for preventing neural tube defects. Cochrane Database Syst Revissue 3, CD001056.
16.Prentice, A (2000) Calcium in pregnancy and lactation. Annu Rev Nutr 20, 249–272.
17.Food and Nutrition Board, Institute of Medicine (2001) Dietary Reference Intakes. Washington, DC: National Academy Press; available at http://www.nap.edu
18.Trumbo, P, Schlicker, S, Yates, A & Poos, M (2002) Dietary reference intakes for energy, carbohydrate, fiber, fat, fatty acids, cholesterol, protein and amino acids. J Am Diet Assoc 102, 1621–1630.
19.World Health Organization (1995) Physical Status: The Use and Interpretation of Anthropometry. Report of a WHO Expert Committee. WHO Technical Report Series no. 854. Geneva: WHO.
20.Lopes, C, Aro, A, Azevedo, A, Ramos, E & Barros, H (2007) Intake and adipose tissue composition of fatty acids and risk of myocardial infarction in a male Portuguese community sample. J Am Diet Assoc 107, 276–286.
21.Ferreira, F & Graça, M (1985) Tabela de composição de alimentos portugueses, 2a ed. Lisbon: Intituto Nacional de Saúde Dr. Ricardo Jorge.
22.Centro de Segurança Alimentar e Nutrição (2006) Tabela da Composição de Alimentos. Lisbon: Instituto Nacional da Saúde Dr. Ricardo Jorge.
23.Amaral, C, Sequeira, C & Camacho, M (1993) Iogurte – composição e valor nutritivo de variedades comercializadas em Portugal. Subsídio para a tabela de composição dos alimentos portugueses. Rev Port Nutr issue 3, 35–52.
24.Batista, I & Bandarra, N (1993) Influência de quatro métodos culinários na composição química de várias espécies de peixe. Rev Port Nutr issue 3, 5–14.
25.Mano, M, Meister, M, Fontes, M & Lobo, P (1989) Composição de alguns alimentos cozinhados. Alguns produtos servidos em ‘snack-bares’. Rev Port Nutr issue 4, 19–24.
26.Mano, M, Meister, M, Fontes, M & Lobo, P (1989) Composição de sobremesas doces. Rev Port Nutr issue 1, 16–24.
27.Aro, A, Amaral, E, Kesteloot, H, Rimestad, A, Thamm, M & van Poppel, G (1998) Trans fatty acids in French fries, soups, and snacks from 14 European countries: the Transfair study. J Food Compost Anal 11, 170–177.
28.Aro, A, Antoine, J, Pizzoferrato, L, Reykdal, O & Van Poppel, G (1998) Trans fatty acids in dairy and meat products from 14 European countries: the Transfair study. J Food Compos Anal 11, 150–160.
29.Aro, A, Van Amelsvoort, J, Becker, W, Van Erp-baart, M, Kafatos, A, Leth, T & van Poppel, G (1998) Trans fatty acids in dietary fats and oils from 14 European countries: the Transfair study. J Food Compost Anal 11, 137–149.
30.Van Erp-baart, M, Couet, C, Cuadrado, C, Kafatos, A, Stanley, J & van Poppel, G (1998) Trans fatty acids in bakery products from 14 European countries: the Transfair study. J Food Compost Anal 11, 161–169.
31.Food and Nutrition Board, Institute of Medicine (2002) Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. Washington, DC: National Academy Press.
32.Gal, D, Santos, A & Barros, H (2005) Leisure-time versus full-day energy expenditure: a cross-sectional study of sedentarism in a Portuguese urban population. BMC Public Health 5, 16.
33.Butte, N, Wong, W, Treuth, M, Ellis, K & O’Brian Smith, E (2004) Energy requirements during pregnancy based on total energy expenditure and energy deposition. Am J Clin Nutr 79, 1078–1087.
34.Lachance, P (1998) International perspective: basis, need, and application of recommended dietary allowances. Nutr Rev 56, S2–S4.
35.Yates, A (1998) Process and development of dietary reference intakes: basis, need, and application of recommended dietary allowances. Nutr Rev 56, S5–S9.
36.Clayton, D & Hills, M (1993) Statistical Models in Epidemiology. Oxford: Oxford University Press.
37.Mouratidou, T, Ford, F, Prountzou, F & Fraser, R (2006) Dietary assessment of a population of pregnant women in Sheffield, UK. Br J Nutr 96, 929–935.
39.Erkkola, M, Karppinen, M, Jarvinen, A, Knip, M & Virtanen, S (1998) Folate, vitamin D, and iron intakes are low among pregnant Finnish women. Eur J Clin Nutr 52, 742–748.
40.Sherwood, K, Houghton, L, Tarasuk, V & O’Connor, D (2006) One-third of pregnant and lactating women may not be meeting their folate requirements from diet alone based on mandated levels of folic acid fortification. J Nutr 136, 2820–2826.
41.Rogers, I & Emmett, P (1998) Diet during pregnancy in a population of pregnant women in South West England. ALSPAC Study Team. Avon Longitudinal Study of Pregnancy and Childhood. Eur J Clin Nutr 52, 246–250.
42.Wei, E, Gardner, J, Field, A, Rosner, B, Colditz, G & Suitor, C (1999) Validity of a food frequency questionnaire in assessing nutrient intakes of low-income pregnant women. Matern Child Health J 3, 241–246.
43.Petrakos, G, Panagopoulos, P, Koutras, I, Kazis, A, Panagiotakos, D, Economou, A, Kanellopoulos, N, Salamalekis, E & Zabelas, A (2006) A comparison of the dietary and total intake of micronutrients in a group of pregnant Greek women with the Dietary Reference Intakes. Eur J Obstet Gynecol Reprod Biol 127, 166–171.
44.Wald, N, Sneddon, J, Densem, J, Frost, C & Stone, R (1991) Prevention of neural tube defects: results of the Medical Research Council Vitamin Study. MRC Vitamin Study Research Group. Lancet 338, 131–137.
45.Kirke, P, Daly, L & Elwood, J (1992) A randomised trial of low dose folic acid to prevent neural tube defects. The Irish Vitamin Study Group. Arch Dis Child 67, 1442–1446.
46.Czeizel, A, Dudas, I & Metneki, J (1994) Pregnancy outcomes in a randomised controlled trial of periconceptional multivitamin supplementation. Final report. Arch Gynecol Obstet 255, 131–139.
47.Czeizel, A, Dobo, M & Vargha, P (2004) Hungarian cohort-controlled trial of periconceptional multivitamin supplementation shows a reduction in certain congenital abnormalities. Birth Defects Res A Clin Mol Teratol 70, 853–861.
48.Central Technical Co-ordinating Unit, ICMR (2000) Multicentric study of efficacy of periconceptional folic acid containing vitamin supplementation in prevention of open neural tube defects from India. Indian J Med Res 112, 206–211.
49.Goldberg, B, Alvarado, S, Chavez, C, Chen, B, Dick, L, Felix, R, Kao, K & Chambers, C (2006) Prevalence of periconceptional folic acid use and perceived barriers to the postgestation continuance of supplemental folic acid: survey results from a Teratogen Information Service. Birth Defects Res A Clin Mol Teratol 76, 193–199.
50.Maconochie, N, Doyle, P, Prior, S & Simmons, R (2007) Risk factors for first trimester miscarriage – results from a UK-population-based case–control study. BJOG 114, 170–186.
51.Erkkola, M, Karppinen, M, Javanainen, J, Rasanen, L, Knip, M & Virtanen, S (2001) Validity and reproducibility of a food frequency questionnaire for pregnant Finnish women. Am J Epidemiol 154, 466–476.
52.Torheim, L, Barikmo, I, Hatloy, A, Diakite, M, Solvoll, K, Diarra, M & Oshaug, A (2001) Validation of a quantitative food-frequency questionnaire for use in Western Mali. Public Health Nutr 4, 1267–1277.
53.Willett, W & Lenart, E (1998) Reproducibility and validity of food-frequency questionnaires. In Nutritional Epidemiology, 2nd ed, pp 101–147 [WC Willett, editor]. New York: Oxford University Press.
54.Cade, J, Thompson, R, Burley, V & Warm, D (2002) Development, validation and utilisation of food-frequency questionnaires – a review. Public Health Nutr 5, 567–587.
55.Brown, J, Buzzard, I, Jacobs, D Jr, Hannan, P, Kushi, L, Barosso, G & Schmid, L (1996) A food frequency questionnaire can detect pregnancy-related changes in diet. J Am Diet Assoc 96, 262–266.
56.Anderson, A (2001) Symposium on ‘nutritional adaptation to pregnancy and lactation’. Pregnancy as a time for dietary change? Proc Nutr Soc 60, 497–504.
57.Bothwell, T (2000) Iron requirements in pregnancy and strategies to meet them. Am J Clin Nutr 72, 257S–264S.
58. Directorate General of Health, Maternal, Child and Adolescence Division (2006) Preconceptional health care, 02/DSMIA, 16/01/06.
59.Botto, L, Lisi, A, Robert-Gnansia, E et al. (2005) International retrospective cohort study of neural tube defects in relation to folic acid recommendations: are the recommendations working? BMJ 330, 571.
60.Grosse, S, Waitzman, N, Romano, P & Mulinare, J (2005) Reevaluating the benefits of folic acid fortification in the United States: economic analysis, regulation, and public health. Am J Public Health 95, 1917–1922.
61.De Wals, P, Tairou, F, Van Allen, M et al. (2007) Reduction in neural-tube defects after folic acid fortification in Canada. N Engl J Med 357, 135–142.
62.Llanos, A, Hertrampf, E, Cortes, F, Pardo, A, Grosse, S & Uauy, R (2007) Cost-effectiveness of a folic acid fortification program in Chile. Health Policy 83, 295–303.
63Ingram, C, Fleming, A, Patel, M & Galpin, J (1999) Pregnancy- and lactation-related folate deficiency in South Africa – a case for folate food fortification. S Afr Med J 89, 1279–1284.