cephalopelvic disproportion
Also written as: CPD — Cephalopelvic Disproportion
A condition where the fetal head is too large or the maternal pelvis too small for safe vaginal delivery.
Full Definition
Cephalopelvic disproportion (CPD) occurs when there is a size discrepancy between the fetal head and the maternal pelvis, preventing safe vaginal delivery. This condition can be absolute (pelvis genuinely too small) or relative (due to malposition or asynclitism). CPD is a common indication for caesarean section and may be diagnosed antenatally through pelvimetry or during labour when progress stalls despite adequate contractions. Clinical assessment includes evaluation of pelvic dimensions and estimated fetal weight.
Usage
Usage note: Often abbreviated as CPD in clinical documentation.
In Context
- "The obstetrician suspected cephalopelvic disproportion when labour failed to progress despite strong contractions." — Labour ward notes
- "Antenatal pelvimetry suggested possible CPD requiring elective caesarean section." — Antenatal clinic letter