Who is at risk for pyloric stenosis?

The following groups of people are at increased risk for pyloric stenosis:

Males: Boys are more likely to develop pyloric stenosis than girls.

Firstborn babies: The firstborn child is more likely to develop pyloric stenosis than subsequent children.

Family history: Having a family history of pyloric stenosis increases the risk of the condition.

Prematurity: Babies born prematurely are more likely to develop pyloric stenosis than full-term babies.

Use of certain antibiotics: Certain antibiotics, such as erythromycin, have been linked to an increased risk of pyloric stenosis.

Certain medical conditions: Certain medical conditions, such as Down syndrome, increase the risk of pyloric stenosis.