Why it happens
More than two-thirds of women suffer from heartburn or acid indigestion in the second half of pregnancy. The burning sensation often extends from the bottom of your breastbone to your lower throat.
Heartburn is brought about by some of the hormonal and physical changes of pregnancy. It usually comes and goes until your baby is born.
During pregnancy, the placenta produces a large amount of the hormone progesterone, which relaxes the smooth muscles of the uterus. Progesterone also relaxes the valve that separates your esophagus from your stomach, allowing gastric acids to seep back up. This is what causes that uncomfortable burning sensation.
Progesterone also slows the wavelike contractions of your esophagus and intestines, making digestion sluggish. In later pregnancy, your growing baby crowds your abdominal cavity, pushing stomach acids back up toward your throat.
What you can do about it
There's no surefire way to avoid getting heartburn at night, but you can take steps to minimize the problem.
- Avoid food and beverages that trigger your heartburn. The usual suspects are carbonated drinks; alcohol (which is better avoided anyway during pregnancy); caffeine (which you'll want to limit during pregnancy); chocolate; acidic foods like citrus fruits and juices, tomatoes, mustard, and vinegar; mint products; processed meats; and spicy, highly seasoned, fried, or fatty food.
- Eat small, frequent meals and chew your food slowly and thoroughly. Give yourself two or three hours to digest before going to bed or lying down.
- Sleep with extra pillows under your chest and head. Elevating your upper body will help keep your stomach acids where they belong. You could also try sleeping semi-upright in a comfy recliner.
- Choose clothing and sleepwear that are loose around your abdomen and waist.
- If the problem persists, ask your doctor or midwife to recommend an over-the-counter antacid that's safe to use during pregnancy.