This means food moves slowly through your stomach. You can avoid or relieve heartburn by eating several smaller meals rather than two or three large meals, and avoiding greasy, highly seasoned foods, or processed foods. Your expanding uterus is pressing on your bladder, causing you to urinate more frequently. Help empty your bladder completely by leaning forward as far as possible when you urinate. And if you're waking up often during the night, reduce fluids before bedtime.
Constipation is also common in pregnancy because of relaxing muscles.
Fight it with generous amounts of fiber, and six to eight glasses of water a day.