Crying, feeding and sleeping patterns in 1 to 12-month-old infants.

The crying, feeding and sleeping patterns of 270 infants 0-12 months old were studied using a 24-hour schedule included in a questionnaire given to mothers visiting four well-baby clinics in Finland in 1987-88. Of these infants 78 were under 3, 84 were 3-5, 65 were 6-8 and 43 were over 9 months old. The results showed that the infants less than 3 months old slept on average 15.