Pre-conceptional intake of folic acid supplements is inversely associated with risk of preterm birth and small-for-gestational-age birth: a prospective cohort study

Zheng JS, Guan Y, Zhao Y, Zhao W, Tang X, Chen H, Xu M, Wu L, Zhu S, Liu H, Huang T, Li D. Pre-conceptional intake of folic acid supplements is inversely associated with risk of preterm birth and small-for-gestational-age birth: a prospective cohort study. Br J Nutr. 2016; 115(3): 509-16.