Association between maternal vitamin D deficiency and small for gestational age: evidence from a meta-analysis of prospective cohort studies

To determine whether maternal vitamin D deficiency during pregnancy is associated with small for gestational age (SGA).A comprehensive literature search of PubMed, the Cochrane Library, Embase, and the Elsevier ScienceDirect library was conducted to identify relevant articles reporting prospective cohort studies in English, with the last report included published in February 2017. Pooled odds ratios (ORs) and corresponding 95% confidence...