Chapter 9: Fetal Heart Rate Assessment

The chapter presents two distinct monitoring approaches: intermittent auscultation using a fetoscope or Doppler device combined with manual palpation of contractions, which remains evidence based for low risk pregnancies, and electronic fetal monitoring that provides continuous visual tracings of both fetal heart rate and uterine activity. Electronic monitoring can be performed externally using an ultrasound transducer and tocodynamometer, or internally using a fetal scalp electrode and intrauterine pressure catheter for more precise measurements when membranes have ruptured. The chapter emphasizes interpretation of fetal heart rate characteristics, including baseline rate between 110 and 160 beats per minute, baseline variability as the most important indicator of fetal oxygenation and neurological integrity, and periodic changes such as accelerations and decelerations that reflect fetal responses to labor. Understanding the distinctions between early decelerations from head compression, variable decelerations from cord compression, and late decelerations from placental insufficiency is essential for clinical decision making. The NICHD three tier categorization system provides a standardized framework for classifying fetal heart rate patterns into normal, indeterminate, and abnormal categories that directly guide the urgency and type of interventions needed. The chapter also addresses excessive uterine contractions and describes comprehensive intrauterine resuscitation techniques including maternal repositioning, intravenous fluid administration, supplemental oxygen, reduction of uterine activity, and amnioinfusion to optimize maternal fetal oxygenation and prevent fetal acidemia. These assessments and interventions form the foundation of evidence based intrapartum nursing care.