Causes
Heartburn occurs when the stomach acids flow back into the lower end of the esophagus (reflux). During pregnancy, there are two causes: hormones relax the muscles of the upper opening of the stomach allowing acids to reflux; and your uterus, which is growing, pushes against the stomach causing acids to flow back into the esophagus.
What can I do?
Advice to avoid heartburn.
If you have heartburn:
If nothing works?