Vitamin D During Pregnancy May Enhance Child’s Bone Health

Written By: Gloria Tsang, RD

Title: Founding Registered Dietitian

Alumni: University of British Columbia

Last Updated on:

Study found pregnant mothers who take extra vitamin D during pregnancy could be protecting their children from osteoporosis later in life

Researchers from Britain studied 198 children born in 1991 and 1992 at a hospital in Southampton, England. They investigated mothers’ body build, nutrition and vitamin D status during pregnancy. Children’s body size and bone mass were measured 9 years later. Researchers found that children born to mothers with better vitamin D level had stronger bones at 9 years of age. The results of this study was published in the Lancet in January 2006.

Editor’s Note – Vitamin D and Bone Health

Many women in North America have reduced levels of Vitamin D – partly due to the skin’s inability to convert Vitamin D when it’s blocked by sunscreen. We always know that women who took vitamin D supplements and were exposed to more sunshine were less likely to have vitamin D deficiency. This study again proved the importance of nutrition during pregnancy and how it affects not only short-term fetal development, but also long-term development in children’s life. The author of this study suggested giving vitamin D supplements to pregnant women, especially if the third trimester occurs during the winter when there is less sunlight, could contribute to stronger bones in their children.

The recommended level for pregnant women is 200 IU of vitamin D daily. Higher level of Vitamin D is needed if you are Vitamin D deficient. If you are taking a prenatal multi, check the label – it’s very likely that it contains Vitamin D.


pregnancy, vitamin d


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