Normal Labour & Mechanism of Labour — Practice
A 27-year-old primigravida at 39 weeks in active labour has a fetus in left occipito-anterior position. As the head distends the perineum, you note the chin has not yet passed the symphysis. According to the mechanism of labour, which movement immediately follows crowning and delivery of the head by extension?
ARestitution
BExternal rotation (of the head, with internal rotation of shoulders)
CInternal rotation of the head
DLateral flexion