This is termed cephalopelvic disproportion. Repeated attempts to deliver in this case may result in harm to the fetus. The fetus may also fail to deliver if it is in an unusual position or has hydrocephalus. Reassess with UTZ if fetus is not clearly vertex on cervical exam. Spontaneous labor is defined as painful uterine contractions ,with complete cervical effacement, bloody show, or spontaneous rupture of membranes.
Cervical exam is done at one hour.
A cervical exam is done again in 1 hr then every 2 hrs thereafter. If not delivered after 12h C-section is done.