Inpatient Obstetric Nurse (NCC) Practice Exam

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What is the typical duration of normal fetal sleep cycles?

10-20 minutes
20-40 minutes
40-60 minutes
60-80 minutes

The correct answer is: 20-40 minutes

The typical duration of normal fetal sleep cycles is indeed 20-40 minutes. During this time, the fetus alternates between sleep and wakefulness, which is crucial for neural development. These sleep cycles are characterized by periods of quiet rest where there may be reduced movement, followed by periods of increased activity. Understanding these sleep cycles is essential for healthcare providers, as variations in fetal movements can assist in assessing fetal well-being. In the clinical setting, prolonged or unusual patterns may warrant further investigation to ensure the fetus is healthy, as changes in this rhythmic pattern can be indicative of stress or other complications. Hence, recognizing that normal fetal sleep cycles last around 20-40 minutes is important for monitoring and interpreting fetal activity.