Pyloric Stenosis Symptoms. Signs of pyloric stenosis usually show up when a baby is 3 to 5 weeks old. Babies who have it don't look sick, but they throw up a lot.

July 24, 2002 -- Exposure to erythromycin between 3 and 13 days of life is associated with an eightfold risk of infantile hypertrophic pyloric stenosis (IHPS) developing shortly thereafter ...

(HealthDay)—Infants who are bottle-fed face a higher risk of developing a serious intestinal condition that can lead to surgery, Danish researchers report. With pyloric stenosis, the lower part ...