Independent risk factors for twin pregnancy adverse fetal outcomes before 28 gestational week by first trimester ultrasound screening

Figure 1 Twin pregnancy ultrasound scan at the 13 + 2 gestational week. A: A dichorionic diamniotic twin pregnancy with two placentas and two distinct amniotic cavities; B: Fetus A with normal ultrasound findings; C: Fetus B with omphalocele shown on crown-rump length section as a mass protrusion of the intestine and liver through a navel hernia in the abdominal wall; D: Color Doppler showed that the blood supply of the mass was from Fetus B. CRL: Crown-rump length; NT: Nuchal translucency.