Supplementation. Snacks were produced daily except on holidays,
packaged in color-coded bags, and transported to 61 supplementation
centers. Women were asked to maintain their usual diet, and snacks were
available from 1500 to 1800, to interfere least with meals. Women were
offered 1 snack/d, and consumption was observed and recorded. Center
staff recorded the womens serial last menstrual period (LMP) dates.
Compliance was defined as a mean of $3 snacks/wk from 90 d before the
LMP date until delivery