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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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oliviaamy oliviaamy
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6 years ago
The most common cause of decreased variability of the fetal heart rate (FHR) lasting 30 minutes or less is:
 
  1. altered cerebral blood flow.
  2. fetal hypoxemia.
  3. umbilical cord compression.
  4. fetal sleep cycles.
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#1
6 years ago
4
1. Incorrect. Altered fetal cerebral blood flow results in early decelerations in the FHR.
2. Incorrect. Fetal hypoxemia would be evident by tachycardia initially then bradycardia. There may be a persistent decrease or loss of FHR variability.
3. Incorrect. Umbilical cord compression results in variable decelerations of the FHR.
4. Correct. A temporary decrease in variability can occur when the fetus is in a sleep state. These sleep states do not usually last longer than 30 minutes.
oliviaamy Author
wrote...
#2
6 years ago
Brilliant
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