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Am J Clin Nutr. 2003 Mar;77(3):720-5.

Multiple micronutrient supplementation during pregnancy does not lead to greater infant birth size than does iron-only supplementation: a randomized controlled trial in a semirural community in Mexico.

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  • 1Department of International Health, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA. uramakr@sph.emory.edu

Abstract

BACKGROUND:

Little is known about the benefits of prenatal multivitamin and mineral supplements in reducing low birth weight.

OBJECTIVE:

We conducted a randomized, double-blind clinical trial in semirural Mexico to compare the effects of multiple micronutrient (MM) supplements with those of iron supplements during pregnancy on birth size.

DESIGN:

Pregnant women (n = 873) were recruited before 13 wk of gestation and received supplements 6 d/wk at home, as well as routine antenatal care, until delivery. Both supplements contained 60 mg Fe, but the MM group also received 1-1.5 times the recommended dietary allowances of several micronutrients.

RESULTS:

At recruitment, the women in the 2 groups were not significantly different in age, parity, economic status, height, or hemoglobin concentration but differed significantly in marital status (4.6% and 2.0% of women in the MM and iron-only groups, respectively, were single mothers) and mean (+/- SD) body mass index (in kg/m(2); 24.6 +/- 4.3 and 23.8 +/- 3.9 in the iron-only and MM groups, respectively). Losses to follow-up (25%) and compliance (95%) did not differ significantly between the groups. In intent-to-treat analyses (MM group: n = 323; iron-only group: n = 322), mean (+/- SD) birth weight (2.981 +/- 0.391 and 2.977 +/- 0.393 kg in the MM and iron-only groups, respectively) and birth length (48.61 +/- 1.82 and 48.66 +/- 1.83 cm in the MM and iron-only groups, respectively) did not differ significantly between the groups.

CONCLUSION:

These findings suggest that MM supplementation during pregnancy does not lead to greater infant birth size than does iron-only supplementation.

PMID:
12600867
[PubMed - indexed for MEDLINE]
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