Predicting mid-pelvic interspinous distance in women using height and pubic arch angle.
Eun Duc NaMin Jung BaekJi Hyun MoonCho Won ParkJin YoonHanna LeeSo Hyeon ParkJi Hyon JangPublished in: PloS one (2023)
ISD is the best predictor of obstructed labor. This study predicted ISD with 99% explanatory power using only the height and PAA. The PAA can be measured by transperineal ultrasound. This formula may successfully predict vaginal delivery or cephalopelvic disproportion.