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.
Sleep - 3 years to 6 years. sleep; child; children; routines; nap; bed; separation; night; waking. There is a wide range of 'normal' sleep patterns between 3 and 5 years. Many children of this age need about 10 to 12 hours of sleep at night. Bedtime may vary a lot. Some may go to bed at 6.30pm, while many go to bed later.