A nurse is conducting a nonstress test on a pregnant woman. The nurse understands that which of the following conditions can lead to loss of fetal heart rate reactivity?
A.
Central nervous system irritability
B.
Certain congenital abnormalities
C.
Fetal acid-base disturbance
D.
Fetal hypoxia
E.
Fetal sleep cycle
ANS: B, C, D, E
The most common cause of loss of fetal heart rate reactivity is a fetal sleep cycle. Other causes are related to central nervous system depression (not irritability) and can include fetal acidosis, hypoxia, and certain congenital abnormalities.
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Fill in the blank with the appropriate word.