My baby age is 0 6+ month weight is 7.25 kg. Now born on 4.1.15 born weight is 2.25kg ...now the issue is my child have heart murmer we checked in paediatric cardiology they take echo and told me small restrictive 2mm PDA left to right shunt ..no pulmonary hypertension... Plan to do elective PDA coil closure ...review after 3month ...my question is PDA size is 2mm its close automatic or not how many days we will wait ...