Pregnancy has long been associated with risks for maternal health both due to the bodys sensitivity to vitamin D (2400IUday) and the fetus vitamin D (less than 2400IUday). Studies have reported a reduced risk of vitamin D deficiency-of about 29 for each gram unit increase in vitamin D level over the 10-year interval-as well as vitamin D secretion (8gramsday) and blood lipid profile (13 versus 13 for each gram unit increase). The measure of vitamin D also has increased with both the change in age and time since being pregnant. This has led to advice for pregnant women to raise vitamin D levels. However it is also unclear whether the recommended nighttime vitamin D concentration 25-hydroxyvitamin D (-25. 25kg) for women of childbearing age is sufficient to protect against vitamin D toxicity.

Received by researchers at the University of Leeds this study analysed data from patients enrolled in the Pregnancy Birth Control Programme (PbcP) an international multisite study designed to examine pregnancy-related factors such as vitamin D serum levels and pregnancy-related adverse pregnancy outcomes. The study took place in the United Kingdom and published in Nutrition Research Therapy.