Table 1 Merging other malformations of fetal OFCs

2

Triplets

21

Twins

5

Trisomy 18

4

Trisomy 21

2

Trisomy 13

2

Microdeletion syndrome

7

Other chromosome abnormalities

71

Accompanied by syndrome and other malformations, such as Ichthyosis (n = 1), Pierre-Robin’s sequence (n = 1), Tetralogy of Fallot (n = 2), velocardiofacial syndrome (n = 3), holoprosencephaly (n = 3), Dandy-Walker malformation (n = 2), diaphragmatic hernia (n = 2), abnormal development of cloacal cavity (n = 3), congenital heart disease (n = 22), limb and spine deformity (n = 14), facial dysplasia (n = 8), and so on (n = 10)