Fig. 1From: A prenatal case misunderstood as specimen confusion: 46,XY/46,XY chimerismThe ultrasound results during early pregnancy. (A) Ultrasound image at 7+2 weeks gestation. (B) Ultrasound image at 9+2 weeks gestation. GS: Gestation sac. The area indicated by the yellow arrow represents the echoless zoneBack to article page