eb941727_Labor_Patterns_OA_vs__OP_Labor_Patterns_Posterior__sunny_side_up_
[Anterior (ideal)] Time to 4 cm not clinically important – meaning healthy women can eat; labor at home now etc. [Posterior (sunny side up)] 
Time to 4 cm can be 24 hrs if rotation needed to enter brim
Labor Patterns
Posterior (sunny side up)