. Author manuscript; available in PMC: 2016 Apr 1.

Published in final edited form as: Birth Defects Res A Clin Mol Teratol. 2015 Mar 28;103(4):260–268. doi: 10.1002/bdra.23353

Table 2.

Detection Rates for Certain Fetal Malformations during 11 to 14 week Ultrasound Imaging

Detection rate	Examples of malformations
100%	Acrania, anencephaly, ectopia cordis, encephalocele
50–99%	Cystic hygroma, double-outlet right ventricular flow, Fallot, gastroschisis, omphalocele, holoprosencephaly, hypoplastic left heart syndrome, limb reduction, mega-cystis, polydactyly, septal defects, transposition of great vessels, valvular disease
1–49%	Spina bifida, hydrocephalus, skeletal dysplasia, facial cleft, Dandy-Walker, aortic coarctation, arthyrogryposis
0%	Corpus callosum agenesia, bladder exstrophy, cyst adenomatoid malformation, cerebellar hypoplasia, duodenal atresia, hydronephrosis, renal agenesis, duplex kidneys, bowel obstruction, extra-lobar sequestration