1Institute of Medicine, National Academy of Sciences. Nutrition during Pregnancy: Weight Gain and Nutrient Supplements. Washington, DC: National Academy Press, 1990.
2Koblinsky, MA. Beyond maternal mortality – magnitude, interrelationship, and consequences of women's health, pregnancy-related complications and nutritional status on pregnancy outcomes. Int. J. Gynaecol. Obstet. 1995; 48: S21–32.
3Haines, PS, Siega-Riz, AM, Popkin, BM. The Diet Quality Index Revised: a measurement instrument for populations. J. Am. Diet. Assoc. 1999; 99: 697–704.
4Patterson, RE, Haines, PS, Popkin, BM. Diet Quality Index: capturing a multidimensional behavior. J. Am. Diet. Assoc. 1994; 94: 57–64.
5Kennedy, ET, Ohis, F, Carlson, S, Fleming, K. The Healthy Eating Index: design and applications. J. Am. Diet. Assoc. 1995; 95: 1103–8.
6Basiotis, PP, Guthrie, JF, Bowman, SA, Welsh, SO. Construction and evaluation of a Diet Status Index. Farm. Econ. Nutr. Rev. 1995; 8(2): 2–13.
7US Department of Agriculture, Department of Health and Human Services. Dietary Guidelines for Americans, 5th ed [Online]. Available at http://www.usda.gov/cnpp/DietGd.pdf. Accessed 29 January 2001
9Food Surveys Research Group, Agriculture Research Service (ARS). 1994 Continuing Survey of Food Intakes by Individuals (CSFII) 1994 [CD-ROM]. Disks 1 and 2. Riverdale, MD: ARS, 1994.
10US Department of Agriculture. USDA Nutrient Data Base for Standard Reference, Release *12. Riverdale, MD: Agriculture Research Service, 1998.
11Block, G, DiSogra, C. WIC Dietary Assessment Validation Study. Final Report. Alexandria, VA: US Department of Agriculture, Food and Nutrition Service, 1995.
12Block, G, Coyle, LM, Hartman, AM, Scoppa, SM. Revision of dietary analysis software for the health habits and history questionnaire. Am. J. Epidemiol. 1994; 139: 1190–6.
13Block, G, Thompson, FE, Hartman, AM, Larkin, FA, Guire, KE. Comparison of two dietary questionnaires validated against multiple dietary records collected during a 1-year period. J. Am. Diet. Assoc. 1992; 92: 686–93.
14Block, G, Woods, M, Potosky, A, Clifford, C. Validation of a self-administered diet history questionnaire using multiple diet records. J. Clin. Epidemiol. 1990; 43: 1327–35.
15Subar, AF, Thompson, FE, Smith, AF, Jobe, JB, Ziegler, RG. Improving food frequency questionnaires: a qualitative approach using cognitive interviewing. J. Am. Diet. Assoc. 1995; 95: 781–8.
17National Cancer Institute (NCI). 5-A-Day for Better Health. RFA No. CA-92-17: Bethesda, MD: NCI, 1992.
18National Research Council, Subcommittee on the 10th Edition of the RDAs, Food and Nutrition Board, Commission on Life Sciences. Recommended Dietary Allowances, 10th ed. Washington, DC: National Academy Press, 1989.
19Kopp-Hoolihan, LE, van Loan, MD, Wong, WW, King, JC. Longitudinal assessment of energy balance in well-nourished, pregnant women. Am. J. Clin. Nutr. 1999; 69: 697–704.
20Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes: Applications in Dietary Assessment. Washington, DC: National Academy Press, 2000.
21Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B-6, Folate, Vitamin B-12, Pantothenic Acid, Biotin, and Choline. Washington, DC: National Academy Press, 1998.
22Yates, AA, Schlicker, SA, Suitor, CW. Dietary Reference Intakes: the new basis for recommendations for calcium and related nutrients, B vitamins, and choline. J. Am. Diet. Assoc. 1998; 98: 699–706.
23Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2001.
24Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. Washington, DC: National Academy Press, 1997.
25Institute of Medicine, Committee on Nutritional Status during Pregnancy and Lactation, Food and Nutrition Board, Subcommittee for Clinical Application Guide. Nutrition during Pregnancy and Lactation: An Implementation Guide. Washington, DC: National Academy Press, 1992.
26Siega-Riz, AM, Herrmann, TS, Savitz, DA, Thorp, J. The frequency of eating during pregnancy and its effect on preterm delivery. Am. J. Epidemiol. 2001; 153: 647–52.
27Lawrence, KM, James, N, Miller, MH, Tennant, GB, Campbell, H. Double-blind randomized controlled trial of folate treatment before conception to prevent recurrence of neural-tube defects. Br. Med. J. 1981; 282: 1509–11.
28Scholl, TO, Hediger, ML, Schall, JI, Khoo, C, Fisher, RL. Dietary and serum folate: their influence on the outcome of pregnancy. Am. J. Clin. Nutr. 1996; 63: 520–5.
29Siega-Riz, AM, Bodnar, LM, Savitz, DA. What are pregnant women eating? Nutrient and food group differences by race. Am. J. Obstet. Gynecol. 2002; 186: 480–6.
30Goldenberg, RL, Tamura, T, Neggers, Y, Copper, RL, Johnston, KE, DuBard, MB, et al. The effect of zinc supplementation on pregnancy outcome. J. Am. Med. Assoc. 1995; 274: 463–8.
31Neggers, YH, Cutter, GR, Acton, RT, Alvarez, JO, Bonner, JL, Goldenberg, RL, et al. A positive association between maternal serum zinc concentration and birth weight. Am. J. Clin. Nutr. 1990; 51: 678–84.
32Rosner, B, Gore, R. Measurement error correction in nutritional epidemiology based on individual foods, with application to the relation of diet to breast cancer. Am. J. Epidemiol. 2001; 154: 827–35.
33Carmichael, SL, Shaw, GM, Selvin, S, Schaffer, DM. Diet quality and risk of neural tube defects [abstract]. Am. J. Epidemiol. 2000; 151(11): S6.
34Philipps, C, Johnson, NE. The impact of quality of diet and other factors on birth weight of infants. Am. J. Clin. Nutr. 1977; 30: 215–25.
35Burke, BS, Beal, VA, Kirkwood, SB, Stuart, HC. Nutrition studies during pregnancy. Am. J. Obstet. Gynecol. 1943; 46: 38–52.
36Loris, P, Dewey, KG, Poirier-Brode, K. Weight gain and dietary intake of pregnant teenagers. J. Am. Diet. Assoc. 1985; 85(10): 1296–305.
37Haste, FM, Brooke, OG, Anderson, HR, Bland, JM, Peacock, JL. Social determinants of nutrient intake in smokers and non-smokers during pregnancy. J. Epidemiol. Community Health 1990; 44: 205–9.
38Haste, FM, Brooke, OG, Anderson, HR, Bland, JM, Shaw, JM, Griffin, J, Peacock, JL. Nutrient intakes during pregnancy: observations on the influence of smoking and social class. Am. J. Clin. Nutr. 1990; 51: 29–36.
39Block, G, Abrams, G. Vitamin and mineral status of women of childbearing potential. Ann. N.Y. Acad. Sci. 1993; 678: 244–54.
40Skinner, JD, Carruth, BR, Pope, J, Varner, L, Goldberg, D. Food and nutrient intake of white, pregnant adolescents. J. Am. Diet. Assoc. 1992; 92(9): 1127–9.
41Endres, J, Dunning, S, Poon, S, Welch, P, Duncan, H. Older pregnant women and adolescents: nutrition data after enrollment in WIC. J. Am. Diet. Assoc. 1987; 87(8): 1011–9.
42Lenders, CM, McElrath, TF, Scholl, TO. Nutrition in adolescent pregnancy. Curr. Opin. Pediatr. 2000; 12: 291–6.
43Suitor, CW, Gardner, JD, Feldstein, ML. Characteristics of diet among culturally diverse group of low-income pregnant women. J. Am. Diet. Assoc. 1990; 90: 543–9.
44Rush, D, Sloan, NL, Leighton, J, Alvir, JM, Horvitz, DG, Seaver, WBV, et al. Longitudinal study of pregnant women. Am. J. Clin. Nutr. 1988; 48: 439–83.
45NDS-R Software, © Regents of the University of Minnesota Nutrition Coordinating Center. All Rights Reserved.
46Lewis, CJ, Crane, NT, Wilson, DB, Yetley, EA. Estimated folate intakes: data updated to reflect food fortification, increased bioavailability, and dietary supplement use. Am. J. Clin. Nutr. 1999; 70: 189–207.