When Will My Baby Sleep Through the Night?
The most asked question in every parent WhatsApp group. Here is the honest, evidence-based answer - not the one that makes you feel guilty.
What Does "Sleeping Through" Actually Mean?
In sleep research, "sleeping through the night" is defined as a continuous sleep stretch of 5 to 6 hours - not the 8 to 10 hours most exhausted parents are imagining. When a study says "70% of babies sleep through by 9 months," they mean a 5-hour stretch, usually from around midnight to 5am.
A full 7- to 8-hour unbroken night consistently is something most babies do not achieve reliably until somewhere between 6 and 12 months - and some perfectly healthy toddlers still wake once a night at 18 months.
If a relative asks "is baby sleeping through yet?" - remember they almost certainly slept through their own babies' night waking after a couple of weeks. Human memory of new-parent exhaustion is notoriously short.
Realistic Expectations by Age
| Age | Normal Night Waking | Realistic Expectation |
|---|---|---|
| 0-6 weeks | Every 2-3 hours | Feeding around the clock is normal and necessary |
| 6-12 weeks | Every 3-4 hours | One longer stretch of 4-5 hours may begin |
| 3-6 months | 1-3 times per night | Some babies stretch to 6 hours; many still wake 2-3 times |
| 6-9 months | 1-2 times per night | Many consolidate to one feed; some still need two |
| 9-12 months | 0-1 times per night | Many night-wean naturally as solids increase |
| 12+ months | Usually 0 feeds needed | Night waking may still occur around illness or teething |
These are ranges, not milestones your baby must hit. There is significant natural variation. A study in the journal JAMA Pediatrics (2012) found that at 6 months, about 28% of babies still woke two or more times per night - and those babies had no developmental differences from babies who slept longer at 6 years old.
Biological Readiness Factors
Three physical factors affect when your baby is ready to go longer without feeding at night:
Stomach size
Newborns have stomachs the size of a walnut. By 3 months they can hold more and may stretch to 4 hours between feeds. By 6 months most can comfortably go 8-10 hours without calories if they are getting adequate intake during the day.
Caloric needs
Breastfed babies metabolise milk faster than formula-fed babies and may genuinely need to feed more often. If a breastfed baby is waking frequently before 6 months, it is almost always a real feeding need, not a habit.
Neurological maturity
The circadian rhythm (the internal body clock) is not mature until around 3-4 months. Before that, babies genuinely cannot distinguish day from night biologically. Expecting a newborn to sleep through is expecting the impossible.
When early sleep-through can be a concern
A newborn under 6 weeks who sleeps more than 4-5 hours without waking to feed needs to be woken for feeds. Babies this young cannot always wake themselves when hungry. If your newborn seems very sleepy and is not feeding well, contact your polyclinic or KKH lactation service - it may indicate jaundice or feeding difficulty.
Approaches to Longer Sleep
There is no single right method - what works depends on your baby's temperament, your family's values, and how much sleep deprivation you can tolerate.
| Approach | What It Involves | Best For |
|---|---|---|
| Wait it out | Respond to all waking, trust biological maturation | Families managing okay with current sleep |
| Gentle shaping | Consistent routine, drowsy-but-awake, no formal training | 4+ months, families who prefer gradual change |
| Structured sleep training | Ferber, CIO, or chair method with clear plan | 6+ months, families reaching exhaustion crisis |
Singapore cultural expectations around sleep can create pressure to have your baby sleeping through much earlier than is biologically typical. Ignore the comparisons in parent groups - babies vary enormously and it does not reflect your parenting ability.