It is not uncommon for some women to suffer from diarrhea during pregnancy. That's becuase the placenta secrets a hormone called relaxin which quiets smooth muscle contractions, which can relax the digestive tract and allow food to pass through too quickly. You may want to drink some Gatorade every day to help and replenish some electrolytes that you may be losing. Otherwise, if you doctor has checked it out to make sure it's not caused by an infection or food posioning then, most likely it's due to the reason above and you'll just have to do your best to keep up with fluids. On the days you have the diarrhea, you may want to cut back on the high fiber foods.Sue Gilbert, M.S., Nutritionist at iVillage.com