Our second baby is 11 weeks old and sudd
À titre indicatif uniquement. Ce n’est pas un avis médical.
Question
Our second baby is 11 weeks old and suddenly sleeps 8 hours at night. Is that safe, or should we wake her to feed? Real household: caregiver juggling school week and one elder or sibling nearby. Schedule: Mon; overnight. Kitchen/home right now: safe sleep on her back in a bare crib. Already tried: waking her every 2 hours out of worry. Please answer as a practical family-care guide: what to do next tonight/today, what to avoid, and a clear decision tree. Constraints: respect «No diagnosis, no medication changes»; no dosing kids/pets/elders yourself; no mystery powders or buying prescription meds online; keep steps screenshot-friendly under ~25 minutes where cooking/care applies. Structure your help as (1) what I already tried vs better alternatives, (2) constraints/avoid list, (3) red flags—when to stop DIY and get clinical/urgent help. Keep the voice concrete and kind for a tired caregiver; stay inside kitchen/home-care/communication levers only. Name what success looks like in 24 hours without promising cures. Avoid brand shopping lists; focus on routines, food already at home, and communication scripts caregivers can screenshot.
Réponse
Short answer: an 8-hour stretch at 11 weeks is not automatically a problem — but whether she still needs a night feed is decided by her weight gain, not by the clock, and that question belongs to her pediatrician or midwife. You don't have to keep waking her out of worry, and you don't have to guess either: the answer comes from a test weight and a watched feed.
Here's the one-pager, saved for the fridge and for the clinic: baby-11week-long-night-onepager-2026-10-26-2e1695fe.pdf
1) What you've tried vs. a better alternative
| What you've tried | Better this week |
|---|---|
| Waking her every 2 hours out of worry | Let her wake herself for feeds. A rigid 2-hourly alarm costs your sleep and your milk supply's rhythm, and it makes night feeds a scheduled event rather than hunger. Exception: if your midwife or clinic gave you a written feeding interval, that plan wins over anything here. |
| Worrying about the long stretch at 3 a.m. | Three facts settle it — daytime feeding, wet nappies vs her own usual, and weight gain. Bring those numbers to the clinic instead of deciding at 3 a.m. |
| Feeding her when she woke but wasn't hungry | If she wakes and settles on her own, let her settle. What you do at 02:00 becomes what she expects at 02:00. |
| One person covering the whole night | Split it: one adult owns a fixed block (e.g. 21:00–02:00), the other takes the rest, so one of you gets one unbroken 4–5 hours. Baby on her back in her own crib in both blocks. |
Her age range (4–12 months) needs 12–16 hours in 24 hours including naps, and night waking is normal in infancy — many babies still wake through the night for the first year. (AASM 2016 consensus; Newcastle Children's Hospital infant sleep service.)
The question that actually belongs to her clinician: *"Is she still gaining weight well, and at what point do we stop waking her for night feeds?"* That's on your clinic sheet already.
2) Tonight / today, in about 20 minutes of work
- Bedtime: dim room → white noise → feed → on her back, own firm flat crib → step away. Same order as every other night, no new experiment tonight. (Your current setup — back, bare crib — is exactly right. Keep it.)
- Overnight: feed her if she's hungry; let her settle herself otherwise. No 2-hourly alarm to wake her.
- Morning (~5 min): fill in the log — longest stretch, feeds, wet nappies, how she finished each feed. One row per feed; times only are enough.
- Before the next visit: ask for a test weight and to have one feed watched for latch and milk transfer. Bring the log and her last weight with its date.
Avoid: no changes to bottle volumes or formula strength; no water, juice, cereal or any powder in a bottle; nothing bought online; no sleep supplements or drops; never on a sofa, armchair or adult bed; no bed-sharing if anyone smokes, drinks, takes anything drowsy, or if she was born early or under 2.5 kg; no "cry it out" at 11 weeks; don't read an app's sleep score as a verdict.
3) Decision tree
```
Long stretch at 11 weeks
│
├─ Any red flag below? ──► STOP home care → emergency / same-day help now
│
├─ Feeding well by day, wet nappies as usual, no illness, weight gain known
│ └─► Let her sleep. Log tonight. Ask the clinic about night feeds.
│
├─ Weight gain unknown, or wet nappies fewer than her usual
│ └─► Book a weight check (test weight). Keep feeds responsive meanwhile.
│
└─ "She just isn't right" — less feeding, floppy, unusually sleepy, or 38 °C+
└─► Under 3 months: seen the same day, don't wait for morning.
```
Red flags — go now: hard to wake or limp, won't feed at all, weak or high-pitched cry, fast/laboured breathing or blue lips, green vomit or blood in stool, fitting. Same day, don't wait: temperature 38 °C or above (or changing temperature) — under 3 months this counts even if she looks well; markedly fewer wet nappies or a deeply sunken soft spot; not gaining weight; sleeping much more and feeding much less; or simply a parent's "she isn't right."
Success in 24 hours (a direction, not a cure): she wakes and feeds when hungry and settles back on her own; daytime feeds and wet nappies unchanged from her usual; you get one unbroken 4–5-hour stretch handed over by another adult; the log is filled in so the next visit is a numbers conversation instead of a guessing game.
One thing I can't decide for you, and won't pretend to: whether she needs a night feed at her weight. If you'd like, I can set a daily8 a.m. reminder to fill in the 24-hour log — say the word and I'll turn it on.