Research Paper Title Association between Maternal Serum 25-hydroxyvitamin D Level and Pregnancy and Neonatal Outcomes: Systematic Review and Meta-analysis of Observational Studies. Study Question What is the association between maternal levels of serum 25-hydroxyvitaminD (25-OHD; the best measure of vitamin D status in humans) and pregnancy and neonatal outcomes. Summary Answer Vitamin D insufficiency is… Read More