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The Value of the Cerebroplacental Ratio as an Independent Predictor of Adverse Perinatal Outcome

Ramirez Pujadas, Amparo; Pina Perez, Silvia; Jurado Seguer, Judith; Pijuan Panades, Nuria; Deus Botti, Carolina; Costa Pueyo, Jordi, Spain.

To determine the association between third trimester cerebroplacental ratio (CPR) and adverse perinatal outcomes in appropriate?for?gestational?age (AGA) fetuses. To know the prevalence of pathological CP Rin low risk term pregnancies.
Observational prospective study in low risk singleton pregnancies which delivered over the period of January 201XX to December 201XX, who underwent an ultrasound scan where Doppler parameters were measured between 37 to 42 week of pregnancy. Ethical approval and informed consent of the patients were obtained. CPR was calculated as the ratio between the umbilical artery pulsatility index (UA-PI) and fetal middle cerebral artery plasticity index (MCA-PI). Adverse perinatal outcomes were defined as presence of pathological cardiotocography (CTG) trace, arterial cord blood pH Results:
A total of 150 low risk pregnancies were included. Pathological CPR was found in 10.7 % of the cases. The mean age was 31 (range 18-42) and gestational age at ultrasound was 39+3 (37 - 41.3) weeks. The median birth weight was 3390 g There was no correlation between CPR result and the need of operative delivery for fetal compromise, low neonatal pH or low a pgar and CPR. Conclusions: Our findings in this prospective study demonstrate that lower fetal CPR does not modify delivery route and is not associated with any other perinatal adverse outcome. Calculating the CPR does not add value to assessment in the prediction of adverse perinatal outcome in women with a singleton low risk gestation.

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