inferior pelvic aperture

pel·vic out·let

[TA]
the lower opening of the true pelvis, bounded anteriorly by the pubic arch, laterally by the rami of the ischium and the sacrotuberous ligament on either side, and posteriorly by these ligaments and the tip of the coccyx.

in·fe·ri·or pel·vic ap·er·ture

(in-fēr'ē-ŏr pel'vik ap'ĕr-chŭr)
The lower opening of the true pelvis, bounded anteriorly by the pubic arch, laterally by the rami of the ischium and the sacrotuberous ligament on either side, and posteriorly by these ligaments and the tip of the coccyx.
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