The prevalence of vitamin D deficiency during pregnancy and its association with preterm birth have attracted much public health attention.
Link to Publication: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882713/
Qin LL, et al. Does maternal vitamin D deficiency increase the risk of preterm birth: A meta-analysis of observational studies. Nutrients. 2016;8(5):301.