Fig. 4
From: New ultrasound features in diagnosing fetal anal atresia: a multicenter prospective cohort study

Illustration for normal fetal anal canal (2D, transabdominal). (a) “equal sign” on coronal plane; (b) “target sign” on transverse plane α.
From: New ultrasound features in diagnosing fetal anal atresia: a multicenter prospective cohort study
Illustration for normal fetal anal canal (2D, transabdominal). (a) “equal sign” on coronal plane; (b) “target sign” on transverse plane α.