After coming head of breech will have difficulty in delivery in all of the following conditions except.
Hydrocephalus
Placenta pre
Incomplete dilatation of cervix
Extension of head
-In placenta pre, if the baby has already delivered then its likely that the placenta was not type 4 and then the after coming head will deliver too. -It will be difficult to deliver in remaining conditions because In hydrocephalus the head is simply too big for the pelvic dimensions and often requires a craniocentesis or a craniotomy to decompress the head Incomplete dilatation acts as a grip on the fetal neck In extension of head due to the chin of the baby getting stuck on the sacrum or the symphysis
Labour - normal, abnormal, malposition, malpresentation and their management