posterior sagittal diameter

pos·te·ri·or sag·it·tal di·am·e·ter

distance from the sacrococcygeal junction to the middle of an imaginary line running between the left and right ischial tuberosities.

pos·te·ri·or sag·it·tal di·am·e·ter

(pos-tēr'ē-ŏr saj'i-tăl dī-am'ĕ-tĕr)
Distance from the sacrococcygeal junction to the middle of an imaginary line running between the left ischial and right ischial tuberosities.
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