Fig. 31-6 The bony pelvis and fetal head. Note how the head turns as it occupies first the inlet, then the cavity, and finally the outlet. (Based on Smout and Jacoby, after Bumm.)
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Fig. 31-6 The bony pelvis and fetal head. Note how the head turns as it occupies first the inlet, then the cavity, and finally the outlet. (Based on Smout and Jacoby, after Bumm.)