Follow age-appropriate wake windows and sleep cues

Track your baby's awake time between naps and watch for sleepy cues (yawning, eye rubbing, fussiness) to time naps before overtiredness sets in. Wake windows vary by age: newborns tolerate about 45-90 minutes awake, 3-4 month olds about 1.5-2 hours, 5-7 month olds about 2-3 hours, and 8-12 month olds about 2.5-4 hours. Putting baby down at the right time is the single most effective way to reduce bedtime battles.

Why It Works

Babies who stay awake too long become overtired and produce cortisol, which makes it harder for them to fall asleep and stay asleep. Catching the right sleep window, when the body's natural sleep pressure is high but cortisol has not spiked, leads to faster settling and longer sleep stretches.

Tips

• Early sleepy cues (staring off, quieting down, losing interest in play) are more reliable than late cues (crying, arching back) which signal overtiredness
• Wake windows gradually lengthen as babies grow; adjust every few weeks
• The last wake window of the day (before bedtime) is typically the longest
• Track naps for a week using a simple notebook or app to spot your baby's natural pattern
• Newborns under 8 weeks rarely follow a predictable schedule; focus on cues rather than the clock