Classification	Station
Outlet	The fetal skull has reached the pelvic floor; the scalp is visible at the introitus without separating the labia.
	The fetal head is at or on the perineum.
	The sagittal suture is in the anteroposterior diameter or in the right or left occipitoanterior or occipitoposterior position.
	Rotation does not exceed 45 degrees.
Low	The leading edge of the fetal skull is station +2 cm or more.
	The head is not on the pelvic floor.
Mid	The head is engaged, but the leading edge of the skull is above station +2 cm.
High	Forceps and vacuum are not included in this classification.