“…what will require expert cardiological care at some stage) are generally reported at about 1% of live births or slightly less, (4,71,72,73) with eight common types of lesions making up 85% of all clinically significant CHD (ventricular septal defect, atrial septal defect, patent ductus arteriosus, pulmonic stenosis, tetralogy of Fallot, coarctation of the aorta, aortic stenosis, atrioventricular septal defect.) (72) Most reliable studies indicate that, with only minor variations, the incidence is constant worldwide, across geographic and ethnic backgrounds, and in spite of variations in socio-economic conditions.…”