Diagnostic Value and High-Risk Factors of Two-Dimensional Ultrasonography Combined with Four-Dimensional Ultrasonography in Prenatal Ultrasound Screening of Fetal Congenital Malformations

Table 1

Distribution of fetal malformations.

Classification of fetal malformations	Number of cases ()	Constituent ratio (%)
Neurological malformation	21	24.14
Cardiovascular system malformation	15	17.24
Facial deformity	17	19.54
Digestive system malformation	5	5.75
Skeletal system deformity of extremities	9	10.34
Genitourinary system malformation	14	16.09
Multiple malformations	6	6.90
Total	87	100.00