Differing effects of low and high bulk maternal dietary supplements during pregnancy

The study attempted to determine if the bulk of dietary supplements given to pregnant women after midgestation affects fetal growth. 127 Zulu women were randomly assigned to four groups, two of which received daily food supplements designed to raise their energy, protein and vitamin intakes to levels recommended by the U.S. Food and Nutrition Board. One of these supplements had a high bulk, the other a low bulk. The third supplement contained only zinc and the fourth a placebo. Women in all four groups had a similar weight gain and length of gestation. Birth weights were from 6.5 to 9.5% greater with the low bulk than with the other supplements.