What correctly matches the type of deceleration with its likely cause?
a. Early deceleration—umbilical cord compression
b. Late deceleration—uteroplacental inefficiency
c. Variable deceleration—head compression
d. Prolonged deceleration—cause unknown
ANS: B
Late deceleration is caused by uteroplacental inefficiency. Early deceleration is caused by head compression. Variable deceleration is caused by umbilical cord compression. Prolonged deceleration has a variety of either benign or critical causes.
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