From: Magnetic resonance imaging in late pregnancy to improve labour and delivery outcomes – a systematic literature review
Midpelvis measurements
Minimum dimensions
Anteroposterior midpelvic distance
≥12·0 cm
Anteroposterior pelvic outlet
≥11·0 cm
Transverse midpelvic distance (interspinal distance)
≥9·5 cm
Transverse pelvic outlet (intertuberous distance)
≥10·5 cm