[Retracted] Diagnostic Value of Abdominal B-Ultrasound for Congenital Heart Disease Complicated with Extracardiac Malformation in the Second Trimester of Pregnancy

Table 2

Comparison of fetal cardiac malformations during different pregnancies (n, %).

Pregnancy	Number of cases	Number of confirmed cases	Abdominal B-scan
Second trimester	25	88% (22/25)	72% (18/25)
Late pregnancy	25	60% (15/25)	40% (10/25)
X^2		5.094	5.195
P value		0.024	0.023