The pair acted in concert with one another — even experiencing timed
arousals out of sleep states Both Sears and his wife, by working with the needs of their infant for closeness, experienced better sleep.
Breastfeeding changes where and how the baby is placed next to the mother, to begin with, and the infant's
arousal patterns, how sensitive the baby and the mother are to each other's movements and sounds and proximities, as well as the infant's and the mother's
sleep architecture (how much time each spends in various
sleep stages and how and when they move
out of one
sleep stage into another) are very different between bottle feeding and breastfeeding mother - infant pairs.