High doses of folic acid in the periconceptional period and risk of low weight for gestational age at birth in a population based cohort study

Purpose We investigated the association between maternal use of folic acid (FA) during pregnancy and child anthropometric measures at birth. Methods We included 2302 mother–child pairs from a population-based birth cohort in Spain (INMA Project). FA dosages at first and third trimester of pregnancy were assessed using a specific battery questionnaire and were categorized in non-user