How Newborn Sleep Changes in the First 6 Weeks

Why does my baby only sleep for an hour? Why does my newborn wake every two hours? Why is my baby sleeping all day and awake all night?

Most newborns wake every 2 to 4 hours, sleep in short stretches, mix up day and night, and seem to change their sleep habits every week.

If you’re wondering whether something is wrong, the answer is usually no.

The first six weeks are one of the biggest adjustments your baby will ever make. Sleep during this period is often unpredictable, and that’s completely normal.

Here are the biggest sleep changes many parents notice during the first six weeks.

1. Your newborn sleeps a lot, but not for very long

Many new parents hear that newborns sleep 14 to 17 hours a day. However, what few people mention is that those hours rarely happen all at once.

During the first two weeks, most babies sleep in short stretches of two to three hours before waking to feed again. This happens because newborn stomachs are tiny. They need frequent feeds to support rapid growth. If your baby wakes every few hours, it is actually normal, as it is a biological necessity in the early months.

Frequent night waking in early infancy is normal and expected. Strategies for parents during this phase include:

• Focus on feeding rather than schedules
• Sleep when support is available
• Expect frequent night wakings

2. Your baby may have their days and nights mixed up

One of the most common frustrations during the first month is a baby who sleeps peacefully all afternoon and then seems wide awake at midnight.

Your baby isn’t doing this on purpose.

Before birth, the foetus experiences no meaningful difference between day and night inside the womb. Newborns arrive without a fully developed circadian rhythm, which is regulated by the suprachiasmatic nucleus in the brain and takes several weeks to mature. The hormone melatonin, which promotes sleep, does not begin to be produced endogenously until around three months of age.

Practical strategies to support circadian development include:

• Open curtains during the day
• Keep daytime feeds bright and interactive
• Keep nighttime feeds quiet and calm
• Avoid turning on bright lights overnight

3. Your baby suddenly starts waking more often

Just when you think you’ve figured things out, your baby changes the rules. Many parents notice this around weeks three and four. A baby who seemed settled begins waking more frequently and feeding more often. This pattern is commonly associated with growth spurts.

Growth spurts in early infancy are well documented, occurring at approximately one to three weeks, six weeks, three months, and six months of age (Cleveland Clinic, 2025). During these periods, increased feeding frequency is driven by a temporary increase in nutritional and caloric demand. For breastfed infants, this also serves to increase milk supply through demand-based stimulation.

Recommendations during growth spurts include:

• Continue feeding on demand
• Focus on daytime feedings
• Remember that growth spurts eventually pass

4. Your newborn becomes more alert

By weeks five and six, your baby is becoming noticeably more engaged. They may begin to make eye contact more consistently, respond to your voice, and stay awake for longer stretches between feeds and sleeps.

For some families, this period brings slightly more predictable patterns. For others, it remains unpredictable, and both experiences are within the range of normal.

What to expect during weeks five and six:

• Longer periods of wakefulness, though still typically under 90 minutes
• More social responsiveness and interaction
• Peak fussiness for some babies, particularly those experiencing colic
• Day and night confusion may still be present, though many babies begin to develop slight preference for sleeping at night

It is important to note that progress in newborn sleep is rarely linear. A baby who appeared to be settling into a pattern one week may disrupt that pattern entirely the next. This is developmentally normal and does not indicate that anything has gone wrong.

5. Some babies become fussier before sleep

Around weeks five and six, some babies become fussier before naps or bedtime.

This period of increased fussiness is common and often coincides with major neurological development. Colic affects an estimated 10 to 40 per cent of infants worldwide and typically peaks around six weeks of age before gradually resolving by three to four months. (Singapore Med J, 2019) Prolonged crying in the evenings, often without a clear cause, affects many families during weeks three to six. However, current research points to factors including gut microbiome development, parental anxiety, and sensory sensitivity If you are finding this period particularly challenging, you are not alone.

What Is Normal Newborn Sleep? A Quick Reference

The following table offers a general guide to typical sleep patterns during the first six weeks. These are averages and ranges. Be note that individual babies vary considerably.

Source: Adapted from guidance by the American Academy of Pediatrics

When should you worry about newborn sleep?

Most sleep changes during the first six weeks are normal. However, it is appropriate to consult your paediatrician or healthcare provider if your baby:

• Shows signs of breathing difficulty or irregular breathing during sleep
• Is difficult to rouse or wake for feeds
• Has persistent difficulties feeding or latching
• Is not gaining weight as expected
• Appears unusually lethargic or unresponsive

How Experienced Confinement Nannies Can Help

During the first six weeks, newborn sleep is often unpredictable. Some babies sleep longer stretches. Others wake frequently. Some seem to have their days and nights mixed up. Most are simply adjusting to life outside the womb.

One of the biggest challenges for new parents is not knowing what is normal. When you’re running on little sleep, it is easy to wonder whether something is wrong or whether you’re doing enough.

The goal during these early weeks is not to achieve perfect sleep. It is to ensure that both baby and parents are supported through this period of adjustment.

This is one reason many families choose to engage confinement support during the postpartum period. It is because hiring a confinement nanny can help care for the baby, manage overnight feeds, support the household, and create opportunities for parents to get the rest they need.

What a confinement nanny does do is take over the round-the-clock care of the household so that the new mother and the rest of the family can finally rest.