Why was this study done?
LATE PREGNANCY
A mother’s vitamin status preconception and during pregnancy are important for healthy pregnancy outcomes and offspring development.Truly longitudinal data on changes in vitamin status from preconception to early and late pregnancy and postpartum are sparse, with changes generally inferred from cross-sectional data and lower pregnancy concentrations often ascribed to plasma volume expansion.Few studies have evaluated the influence of vitamin supplementation preconception and during pregnancy.