Sleep Regression (4-Month, 8-Month, 18-Month)
Sleep regression is when baby who was sleeping well suddenly starts waking frequently. Most common at 4 months (developmental leap + permanent change in sleep cycles), 8-10 months (separation anxiety + new skills like crawling), and 18 months (teething + independence).
4-month regression is permanent shift in sleep architecture. Others usually last 2-4 weeks.
Signs: Increased night waking, shorter naps, fighting sleep, more fussy.
What to Do
- Stick to your established routine - consistency is crucial during regression
- Offer extra daytime naps to prevent overtiredness making it worse
- For 4-month regression: May need to teach independent sleep skills (sleep training)
- For 8-month regression: Practice new skills (crawling, standing) during day so baby isn't practicing at night
- Extra comfort is okay - this is developmental, not behavioral
- Move bedtime earlier temporarily if baby is overtired
- Avoid introducing new sleep associations (if you didn't rock to sleep before, don't start now)
- Be patient - most regressions resolve in 2-4 weeks
- 4-month regression is permanent change - may need new approach to sleep
- Tag-team with partner - take shifts so each gets some sleep
- Remember: This is temporary, even though it feels endless