Related Experiment Video
Updated: Aug 25, 2026

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
Published on: June 29, 2013
Intrapartum fetal pulse oximetry and fetal heart rate decelerations
Objectives:
To determine the behavior of fetal oxygenation (FSpO(2)) in different patterns of fetal heart rate decelerations (FHR).
Methods:
A total of 787 decelerations were studied.
Results:
FSpO(2) decreased significantly during decelerations, especially when the alteration was prolonged.
Conclusions:
Modifications in FHR occur simultaneously with alterations in FSpO(2), although the latter do not persist in time. Different degrees of FSpO(2) seen prior to deceleration are an expression of fetal respiratory status.
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