Do pregnant women crave dirt?

They can, but technically they shouldn't.

Cravings for dirt or other nonfood items is called Pica. It is thought to be caused by an iron deficiency, but science seems to be unclear on whether or not there is a complex cause that iron deficiency is only a small part of.

If you are pregnant and craving dirt or other nonfood items, tell your doctor. You may need to be monitored for iron deficiency or other deficiencies and put on special vitamin/mineral supplements.