We know hormones have a profound influence on the gastrointestinal tract. Even women who are not pregnant notice changes in frequency of bowel disorders around the time of their periods. Progesterone, the primary hormone in pregnancy relaxes the muscles lining the digestive tract. This makes gas and bloating more common. Also, as your uterus enlarges more pressure is placed on your intestines. Drinking lots of water will help you have regular bowel movements and this can decrease gas and bloating. Also, a higher fiber diet may be helpful. This will also lead to increase bowel movement frequency. Probiotics, the beneficial bacteria found in yogurt, have a very positive effect on your GI tract. They can help prevent diarrhea, constipation and heartburn. We recommend eating yogurt regularly throughout your pregnancy.