Babies typically drop from 3 naps to 2 naps between 6.5 to 9 months of age, with many experts noting the range to be around 6.5-8 months or up to about 9 months. This transition happens as babies begin to stay awake comfortably for longer periods—about 3 to 3.5 hours at a time. Signs that a baby is ready to drop to 2 naps include trouble falling asleep at nap times and bedtime, waking during the night, refusing naps, having shorter naps, needing a later bedtime to fit in the third nap, or waking unusually early in the morning. The 2 naps usually take place one in the morning and one in the afternoon at consistent times.

In summary:

• Typical age: 6.5 to 9 months
• Signs of readiness: difficulty with naps, waking at night, shorter naps, nap refusals
• New nap schedule: usually one morning and one afternoon nap

This transition helps babies consolidate their sleep and can sometimes improve nighttime sleep as well.