case_images: PMC7407061_01
case_images: Two-dimensional scan showing three yolk sacs and a single placenta.
case_images: CRIOG2020-4340617.001.jpg
case_images: PMC7407061_01_CRIOG2020-4340617.001.jpg
case_images: fig1
case_images: The cardiac activity was visible only for two fetal poles (Figure 1).