8-10 Month Sleep Regression
The 8-10 month regression is a perfect storm: your baby is learning to crawl, pull up, and cruise — while simultaneously developing separation anxiety. They now understand that you exist even when they can't see you, which makes being alone in a dark room much more distressing.
Short answer. A sleep regression is a stretch of disrupted sleep tied to a developmental milestone — your baby's nights and naps suddenly get harder for 2–6 weeks even though you didn't change anything. Common timing: 4 months (sleep cycle maturation, the biggest one), 8–10 months (separation anxiety, crawling), 12 months (walking, language), 18 months (independence push), 2 years (mobility + cognition). Most regressions resolve on their own; the parent's job is consistency, not new sleep tricks. Tracking patterns through the regression (via an app like Nestling) helps you see when it's actually ending.
Expected Duration
2-4 weeks. The separation anxiety component may linger but typically improves by 10-12 months.
What Causes It
- →Separation anxiety peaks — baby understands object permanence (you exist even when gone)
- →Major motor milestones — crawling, pulling to stand, cruising
- →Cognitive explosion — pointing, waving, understanding simple words
- →Possible 3-to-2 nap transition disrupting the schedule
- →Teething (more teeth may be emerging)
Signs to Watch For
- ⚠Screaming or crying when you leave the room
- ⚠Standing up in the crib and not knowing how to get back down
- ⚠Practicing crawling or pulling up in the crib instead of sleeping
- ⚠Clingy behavior during the day
- ⚠Night wakings with genuine distress (not just fussing)
Survival Tips
- ✓Play peek-a-boo during the day to reinforce that you come back
- ✓Practice "getting down" from standing during daytime play
- ✓Do brief check-ins rather than removing baby from the crib
- ✓Offer a comfort object (lovey) if your baby is over 12 months (consult pediatrician for younger)
- ✓Keep separation practice short during the day — leave for 1-2 minutes, return with a smile
- ✓Don't sneak out — always say a brief goodbye so baby learns to trust transitions
- ✓Track the regression timeline with Nestling to see when things start improving
What NOT to Do
- ✕Don't let baby "cry it out" during peak separation anxiety without check-ins — this can increase anxiety
- ✕Don't drop to 1 nap yet — 8 months is too early for that transition
- ✕Don't co-sleep out of desperation if it wasn't your plan — it's very hard to reverse
Frequently Asked Questions
What causes the 8 month sleep regression?
A combination of separation anxiety (understanding object permanence), major motor milestones (crawling, pulling up), and cognitive leaps. Your baby's brain is processing an enormous amount of new information.
My baby keeps standing up in the crib. What do I do?
Practice the "getting down" motion during the day — show them how to bend their knees and lower themselves. Many babies learn to pull up before they learn to get back down, so they get stuck and cry for help.
Should I drop to 1 nap at 8 months?
No — 8 months is almost always too early. The 2-to-1 nap transition typically happens between 13-18 months. If nap 2 is being refused, try extending wake windows by 15 minutes before dropping a nap.
Track This Regression with Nestling
See the regression timeline clearly. Nestling tracks sleep patterns so you can spot when things are improving — and know the light at the end of the tunnel is real.
Try Nestling FreeDisclaimer: This content is for informational purposes only and is not a substitute for professional medical advice. Every baby is different. Always consult your pediatrician with any questions regarding your child's health or development.