The fetal heart rate baseline increases 20 bpm after vibroacoustic stimulation. The best interpretation of this is that the fetus is showing:
a. a worsening hypoxia.
b. progressive acidosis.
c. a reassuring response.
d. parasympathetic stimulation.
ANS: C
The fetus with adequate reserve for the stress of labor will usually respond to vibroacoustic stimulation with a temporary increase in the fetal heart rate (FHR) baseline. An increase in the FHR with stimulation does not indicate hypoxia. An increase in the FHR after stimulation is reassuring and does not indicate acidosis. An increase in the FHR after stimulation is a reassuring pattern and does not indicate problems with the parasympathetic nervous system.
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