A study recently published in the Journal of Steroid Biochemistry and Molecular Biology showed that there was a 59% lower risk of premature birth with higher vitamin D levels in their third trimester.
Blood levels of vitamin D (25(OH)D) in pregnant women showed there was a 46 percent lower risk of preterm birth in women whose concentrations of vitamin D were at least 40 ng/ml, when compared to those women with concentrations lower than 20 ng/ml. These findings were predominantly found in Hispanic and African American women as similar results were not seen in Caucasian women. Furthermore, gestation time seemed to increase along with vitamin d levels and plateau at the 40 ng/ml mark.
These findings further highlight the importance of this vitamin in the health of pregnant women through to labor. This study also highlights the importance of checking for vitamin D levels, as not all participants receive the same benefit from the same dose supplementation.