Which form of decelerations are transitory decreases in FHR and most often caused by umbilical cord compression?
a. Early decelerations c. Late decelerations
b. Variable decelera-tions d. Extended decelera-tions
B
Variable decelerations are transitory decreases in FHR most often caused by umbilical
cord compression. Early decelerations involve a transitory decrease in FHR presumably caused by fetal head compression, which stimulates the vagus nerve to decrease the heart rate. Late decelerations are gradual decreases in the FHR that are related to uterine contractions. There is no such deceleration known as extended decelerations.
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