Revision 2 for 'Cerebroplacental ratio'

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Cerebroplacental ratio

Cerebroplacental ratio (CPR) is an important obstetric ultrasound tool used as a predictor of adverse pregnancy outcome and is calculated by dividing the Doppler pulsatile indices of the middle cerebral artery (MCA) by the umbilical artery (UA).

The index will reflect mild increased in placental resistance with mild reductions in the fetal brain vascular resistance. 

Practical points

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