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What is Diameter of engagement In face presentation/ diameter In face presentation: and explain in detail?
The engaging diameter is submentobregmatic (9.4cm).In face presentation,the biparietal diameter is 7cm behind the face unlike in veex,where it is only 3-4cm distant.The biparietal diameter will pass through the inlet only when the face is low down in the perineum (refer pgno:372 sheila textbook of obstetrics 2 nd edition)