Patent ductus arteriosus (PDA) is a fairly common congenital heart defect in the United States. Although the condition can affect full-term infants, it's more common in premature infants.
On average, PDA occurs in about 8 out of every 1,000 premature babies, compared with 2 out of every 1,000 full-term babies.
PDA also is more common in:
PDA is twice as common in girls as it is in boys.
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