Step I OB/GYN Question

[dochubert]

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Can someone please explain to e the difference between a gynecoid pelvis and a platypelloid pelvis? I was looking at the descriptions and they look alike. Any idea how what clues they might put in the question stem to tell them apart?

Thanks.

 

[mjl1717]

Gynecoid is the MC and is heart shaped/Platypelloid has increased transverse
diameter but the obstetric conjugate diameter and true conjugate diameter is less when compared to Gynecoid