A primigravid client at 26 weeks' gestation asks the nurse what causes heartburn during pregnancy. The nurse should explain to the client that heartburn during pregnancy is usually caused by which of...

A primigravid client at 26 weeks' gestation asks the nurse what causes heartburn during pregnancy. The nurse should explain to the client that heartburn during pregnancy is usually caused by which of the following?

1. Increased peristaltic action during pregnancy.

2. Displacement of the stomach by the diaphragm.

3. Decreased secretion of hydrochloric acid.

4. Backflow of stomach contents into the esophagus.