PMC5220436_01
The arrows are used to demonstrate the hysterotomy scar in the lower uterine segment, into which twin A has implanted.
CRIOG2016-6832094.001.jpg
PMC5220436_01_CRIOG2016-6832094.001.jpg
fig1
Previous ultrasound from an outside hospital did note that the fetuses are low within the uterus (Figure 1).