Table 1.

Classification of congenital heart disease.

CHD types	PA	DORV	TGA	TOF	UVH	SA	IPDA	AVS	PVS	VSD
CHD groups	Non-VSD parents (78)									VSD parents (21)
Number	5	2	3	22	7	8	22	4	5	21
%	6.4	2.6	3.8	28.2	9.0	10.2	28.2	5.1	6.4	100

Note: PA: pulmonary atresia, DORV: double outlet of right ventricular, TGA: arteries transposition, TOF: tetralogy of Fallot, UVH; univentricular hearts, SA: single atrium, IPDA: isolated patent ductus arteriosus, AVS: aortic valve stenosis, PVS: pulmonary valve stenosis, and VSD: ventricular septal defect.