verb (used with or without object), bifurcated, bifurcating. 1. to divide or fork into two branches. adjective. 2. divided into two branches.
Advertisement. By the Numbers. According to the National Sleep Foundation, newborns should sleep 12 to 18 hours out of every 24 (every new parent hopes), with a gradual reduction to 12 to 14 hours for toddlers ages 1 to 3; 11 to 13 hours for preschoolers 3 to 5; and (yes!) 10 to 11 hours for schoolchildren ages 5 to 10.
According to the recommendation, children of different ages need specific amounts of sleep. 1  Infants four to 12 months should sleep 12 to 16 hours per 24 hours (including naps) on a regular basis. 2  Children one to two years of age should sleep 11 to 14 hours per 24 hours (including naps) on a regular basis. Children three to five years of age should sleep 10 to 13 hours per 24 hours (including naps) on a regular basis. Children six to 12 years of age should sleep nine to 12 hours per 24 hours on a regular basis. Teenagers 13 to 18 years of age should sleep eight to 10 hours per 24 hours on a regular basis.