Working nights and Premature labor

Hey guys
Here is an interesting study from Obstetrics and Gynecology that interviewed 1900 women in their 7th month of pregnancy. What they found was that in about 9 percent of the women who worked nights in their first trimester had a 50 percent increased risk of premature labor.
Now obviously we need more studies to examine this issue but it does raise an important issue about avoiding grave-yard shifts during pregnancy.

Obstet Gynecol, December 2005