J Reprod Med
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To assess whether night-float rotation affected resident performance on the Council on Resident Education in Obstetrics and Gynecology (CREOG) in-service examination. ⋯ Although night float rotations necessitate a complete reversal in sleep schedules, we found that night float service did not significantly affect scores On the annual in-service examination. To our knowledge, no studies have evaluated the impact of this schedule on test-taking ability.