Infant sleep movements reveal 60-minute cycles of inactivity that lengthen through first year (opens in new tab)

Infants' activity while sleeping is rhythmic, according to a new study from the University of Surrey. The findings provide crucial insight into sleep cycles of infants in the first year of life. In the largest study of its kind, scientists from Surrey, led by Dr. Eva Winnebeck, investigated the sleep cycle development of 152 infants at ages 3, 6 and 12 months.