Cephalopelvic disproportion

Cephalo-pelvic disproportion (CPD) aka Fetal Pelvic Disproportion (FPD) exists when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal. This may be due to a small pelvis, a nongynecoid pelvic formation, a large fetus, or a combination of these factors. Certain medical conditions may distort pelvic bones, such as rickets or a pelvic fracture, and lead to CPD/FPD. The parameters set forth by American Congress of Obstetricians and Gynecologists or ACOG is an anterior-posterior inlet diameter less than 10cm, a transverse inlet less than 13cm, or a midplane transverse diameter of less than 10.5cm. Management in such case is Caesarean section (CS).^[1]

Transverse diagonal measurement has been proposed as a predictive method.^[2]

See also

• Pelvimetry

References