Android
Heart shaped Most common in men Large spines Long, narrow sacrum Narrow public arch Outlet narrow
Anthropoid
Most common in non whites Oval Shallow sacral arch Narrow pubic arch Flatter sacral curve
Platepelloid
Kidney shaped
Inlet small
Sacrum short
Hard for baby to engage
Gynecoid
Most common in white women
Blunt spines
Curved sacrum
Wide bituberous