A randomized, placebo-controlled trial of the effect of zinc supplementation during pregnancy on pregnancy outcome in Bangladeshi urban poor

Saskia J.M. Osendarp, Joop M.A. Van Raaij, Shams E. Arifeen, M. A. Wahed, Abdullah H. Baqui, George J. Fuchs

Research output: Contribution to journalArticle

Abstract

Background: Maternal zinc supplementation has been suggested as a potential intervention to reduce the incidence of low birth weight in developing countries. To date, placebo-controlled trials have all been performed in industrialized countries and the results are inconsistent. Objective: The objective of this study was to evaluate whether zinc supplementation in Bangladeshi urban poor during the last 2 trimesters of pregnancy was associated with pregnancy outcome. Design: We conducted a double-blind, placebo-controlled trial in which 559 women from Dhaka slums, stratified by parity between 12 and 16 wk of gestation, were randomly assigned to receive 30 mg elemental Zn/d (n = 269) or placebo (n = 290). Supplementation continued until delivery. Serum zinc was estimated at baseline and at 7 mo of gestation. Dietary intake was assessed at baseline and anthropometric measurements were made monthly. Weight, length, and gestational ages of 410 singleton newborns were measured within 72 h of birth. Results: At 7 mo of gestation, serum zinc concentrations tended to be higher in the zinc-supplemented group than in the placebo group (15.9 ± 4.4 compared with 15.2 ± 4.3 μmol/L). No significant effect of treatment was observed on infant birth weight (2513 ± 390 compared with 2554 ± 393 g; NS) or on gestational age, infant length, or head, chest, or midupper arm circumference. The incidence and distribution of low birth weight, prematurity, and smallness for gestational age also did not differ significantly after zinc supplementation. Conclusions: Supplementation with 30 mg elemental Zn during the last 2 trimesters of pregnancy did not improve birth outcome in Bangladeshi urban poor. These results indicate that interventions with zinc supplementation alone are unlikely to reduce the incidence of low birth weight in Bangladesh.

Original languageEnglish (US)
Pages (from-to)114-119
Number of pages6
JournalAmerican Journal of Clinical Nutrition
Volume71
Issue number1
DOIs
StatePublished - Jan 2000
Externally publishedYes

Keywords

  • Bangladesh
  • Developing countries
  • Low birth weight
  • Pregnancy
  • Pregnancy outcome
  • Prematurity
  • Small-for-gestational-age infants
  • Urban poor
  • Zinc supplementation

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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