The hormone progesterone is one of the main causes of excess gas during pregnancy. As your body produces more progesterone to support your pregnancy, progesterone relaxes muscles in your body. This includes the muscles of your intestine. Slower moving intestine muscles mean that your digestion slows down. Few of the remedies are : Don't eat big meals. Take your time and chew thoroughly. Limit how much you drink during meals. Drink from a cup or glass – not from a bottle or through a straw – and don't gulp. Avoid carbonated beverages. Take care.