PDA true is all except ?

Ans. is 'd i.e., More common in term baby During fetal life, most of the pulmonary aerial blood is shunted through the ductus aeriosus into the aoa . Functional closure of the ductus normally occurs soon after bih, but if the ductus remains patent when pulmonary vascular resistance falls, aoic blood is shunted into the pulmonary aery. The aoic end of the ductus is just distal to the origin of the left subclan aery, and the ductus enters the pulmonary aery at its bifurcation Female patients with PDA outnumber males 2 : 1. PDA is also associated with maternal rubella infection during early pregnancy. It is a common problem in premature infants, where it can cause severe hemodynamic derangements and several major sequelae