Ischiopubic Symphysiotomy 7.
After the head and shoulders are outside the vulva, the remainder of the calf readily follows, as it is pulled at a downward angle. It is not necessary to rotate the fetal pelvis per se, as the iliac shafts are capable of spreading. In this case an episiotomy was also done. The calf was delivered alive.
Seemann CW (1983)