Pregnancy and Heartburn  Pregnancy and Heartburn  Chances are
good that you’re one of many pregnant women who experience the
churning and burning of heartburn or acid indigestion. It
typically hits somewhere in the second or third trimester, and
it can be miserable. Heartburn doesn’t really mean your heart is
burning, but it’s a good description of the discomfort that
begins behind the breastbone and moves upward to the neck and
throat. Officially, heartburn is known as gastroesophageal
reflux, when acidic stomach juices or food and fluids back up
into the esophagus, a hollow muscular tube between your mouth
and your stomach.  Why does it happen in pregnancy?  Many women
who have heartburn during pregnancy have never had problems
before. Unfortunately, if you had heartburn before becoming
pregnant, you’re more likely to have symptoms while you are
pregnant. Although the exact reasons aren’t clear, most experts
believe that pregnancy hormones, particularly progesterone, play
a role. Hormones cause relaxation o