Talk:Cephalopelvic disproportion

I'm not an expert - but can we decide whether the hyphen should or should not be used please? This page uses both, while the link I followed has no hyphen.

Pelvimetry and cephalopelvic proportion
How do you calculate cephalopelvic proportion and how does it influence the decisions made before and during labor? --Waqqashanafi (talk) 14:40, 3 February 2016 (UTC)