[Development of sleep/wake patterns in infants during the first 12 months of life].

Objective: This was a nationwide study of sleep circadian in term infants. The aim was to understand the development characteristics of infants' sleep/wake patterns longitudinally in their own home environments over the first 12 months of life.

Method: Totally 524 healthy term infants from 9 urban districts took part in this project Their sleep/wake patterns over 24 h were recorded using parental sleep diaries, from the 2nd day to 12 months old.