8 Month Baby Sleep: Regression, Standing in Crib and Schedule
Eight months brings several things at once: crawling, pulling to stand and separation anxiety. A baby who slept well may start waking every hour — and the honest answer is that sleep records cannot tell you which of these it is.
About the word "regression" — what is known and what is not. The age calendar of regressions (4 / 8 / 12 / 18 months, each with its own cause and its own duration) has no support in the peer-reviewed literature: no study shows a spike of sleep problems at exactly those ages, and the term "sleep regression" returns nothing at all in PubMed. Measurements say something else: in one cohort regular night wakings peaked at nine months, not at four (Scher 1991), and in 72.7 % of six-month-olds the longest stretch of sleep swings widely from night to night (Pennestri 2020) — the spread itself is normal. Hard weeks at this age do happen to some children, and that much is true. But the app does not tell you "your child is in a regression", and it does not name a cause from sleep records. Sources and the full account:
Sleep Regression: What Is Known and What to Do.
Sleep Norms at 8 Months
| Parameter | 8 months | Note |
|---|
| Naps | 2 naps | 3→2 transition done by now |
| Wake window | 3–3.5 hours | Last WW before bed: 3.5–4 h |
| Bedtime | 7:00–7:30 PM | Earlier on rough days |
| Night feeds | 0–1 | Not physiologically needed over 7 kg |
The "8-Month Regression": What Gets Blamed, and What Was Measured
- Learning to crawl and pull to stand — the one link of this kind that has actually been measured. The rise in night wakings tracked the onset of crawling in that particular child, not a calendar age, and accounted for about 17 % of the variance — four fifths lie elsewhere (Scher & Cohen).
- Teething — tested directly and showed no significant link with disturbed sleep; restless waking hours did show one. Rule out illness before blaming teeth (Macknin 2000, Wake 2000).
- Separation anxiety and cognitive leaps — plausible, but in sleep records they are indistinguishable from a changed daytime schedule, the start of an illness or simply a noisier week. That is why the app names no cause.
Sources and the full account: Sleep Regression: What Is Known and What to Do.
Standing in Crib — The Classic 8-Month Problem
Baby pulls to stand but can't get back down. Solution: practice sit-from-standing during play, 10–15 times daily. Within 1–2 weeks, the skill is automatic and nighttime standing stops.
Don't drop to 1 nap at 8 months. A single failed nap is not readiness: look for refusal that holds for two consistent weeks and an evening reached without overtiredness. Average transition age: 14–18 months.
FAQ
How long does the 8-month regression last?
Nobody has measured it, and the numbers in circulation have no study behind them that we could find. Watch the daily sleep total and how your baby feels rather than counting weeks — and rule out illness first. A child who can already fall asleep unaided usually needs less help through a rough patch, at any age.
See the rough patch in numbers
Baby Sleep Planner keeps the sleep history so you can see the daily total instead of guessing — it does not diagnose a regression.
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