Baby growth spurts: how to tell it's one, how long it lasts and when to see a doctor

If your baby suddenly wants to feed all the time, it may be a growth spurt. SGH says babies can feed more often and take larger volumes during one, and that this is normal. HealthHub says the extra feeding only lasts a few days. Keep feeding on cue and keep an eye on wet nappies. If they drop, your baby feeds poorly, or a baby under 3 months has a fever, get medical help quickly.

Here's what you may see at each common age. SGH says the timing is highly individual, so treat these as rough guides.

How to tell your baby is having a growth spurt

Hunger is the big clue. SGH says your baby may want to feed more often than usual and take in larger volumes. HealthHub's Parent Hub adds that a baby in a growth spurt may be hungrier at night as well as by day.

At 1 to 2 months, HealthHub says babies feed every 2 to 4 hours, or more often during a growth spurt. Feeds bunching closer together are one sign.

Sleep can change too. HealthHub names a growth spurt as one cause of a sleep regression, and lists these signs:

• More fussing than usual.
• Waking up several times a night.
• Less napping.
• A change in appetite.

NHS Grampian in Scotland describes the same picture. It says your baby may become fussier and want to feed constantly for a few days. For the sleep side, see our infant sleep regression guide.

When growth spurts happen, and how long they last

Singapore's two main lists don't match exactly, so use the ages as a rough guide. Here's what each source says.

So how long does a growth spurt last? The feeding rush is short. HealthHub says it only lasts a few days, and NHS Grampian also says a few days. Disrupted sleep can go on longer. HealthHub's Parent Hub says sleep regressions are temporary and usually last no more than 4 weeks.

Is my milk enough? Wet nappies and weight tell you

All this feeding can make you doubt your supply. NHS Grampian says frequent feeding on its own isn't a sign that you aren't making enough milk. It suggests checking weight gain and wet and dirty nappies instead. HealthHub adds that feeding more often raises your supply to meet your baby's needs.

Singapore's hospitals and polyclinics give nappy counts you can check:

• SGH says your baby is feeding enough if she seems satisfied after a feed and wets 6 to 8 nappies a day, with or without poo.
• KKH and SingHealth Polyclinics say a baby with enough milk is content and wets about 6 to 8 nappies in 24 hours, with clear urine.
• In the first two days after birth, their leaflet says, your baby may wet only 2 to 3 nappies in 24 hours.
• NUH says your baby should have at least 5 to 6 wet nappies when you leave hospital.

Check the colour too. NUH says urine may turn pink if your baby isn't taking in enough fluids. Its advice is to give more expressed breast milk or formula, and never plain water. If the wet nappies stay low, NUH says to get a medical opinion.

Weight is the other check. SGH's booklet says to talk to your healthcare provider if your baby's weight trend on the growth chart slopes downwards, or jumps by two or more percentile lines. Our guide to breast milk supply covers what KKH and HealthHub advise if you need more milk.

How to get through a growth spurt

Feed when your baby asks. HealthHub and NUH both advise breastfeeding on demand. In the first 4 to 8 weeks, HealthHub suggests at least 8 feeds in 24 hours, and feeding every 2 to 3 hours round the clock.

Bottle-feeding? SGH says to follow your baby's hunger cues whether you breastfeed or bottle-feed. The NHS says formula-fed babies can cluster feed during a spurt too, but warns against overfeeding. Our newborn feeding schedule by age shows how much and how often.

Keep a simple feeding log. SGH's allied health team suggests one to help you understand your baby's own patterns. Jot down each feed and each wet nappy, and take the log along if you're worried. You can share it with your healthcare team.

Expect broken nights for a while. A spurt can make your baby hungrier at night, so night feeds may pick up again. Our guide to the first 6 weeks with a newborn covers those early weeks at home.

When it isn't a growth spurt: see a doctor

A growth spurt makes your baby hungrier. A baby who won't feed, or seems unwell, needs a doctor. Get help quickly if you notice any of these:

• Your baby shows no interest in feeding, sucks poorly or seems sleepier than usual, and has had fewer wet nappies, or none, in the past 12 hours. SGH says this needs a thorough check by a doctor at the earliest.
• A baby under 3 months has a fever, which NUH defines as above 37.5 degrees Celsius from the armpit or 38.0 from the ear. NUH calls this a medical emergency and says to bring your baby to the nearest hospital.
• Wet nappies stay low even after you offer more milk. NUH says to seek a medical opinion.
• The weight trend on your baby's growth chart slopes down or jumps two or more percentile lines. SGH says to discuss this with your healthcare provider.

Help in Singapore: polyclinic, lactation clinic and HealthHub

For feeding worries that aren't urgent, start with the people who already see your baby. That might be your polyclinic, your paediatrician or a lactation consultant. Bring your feeding log, since SGH's allied health team suggests sharing it with your healthcare team.

KKH and SingHealth Polyclinics have a breastfeeding leaflet from their Integrated Maternal and Child Wellness Hub. The nappy counts above come from it, so it's a handy one to read before a visit.

For help with latching or supply, our breastfeeding support guide lists lactation services and helplines in Singapore.

The Health Promotion Board runs HealthHub. Its free pages on breastfeeding and baby sleep cover feeding on demand, growth spurt ages and sleep regressions.

If it's urgent, don't wait for a clinic slot. NUH says a baby under 3 months with a fever should go to the nearest hospital.

Frequently asked questions

How long does a baby growth spurt last?

HealthHub says the extra feeding only lasts a few days, and NHS Grampian agrees. Sleep can stay unsettled for longer. HealthHub's Parent Hub says sleep regressions usually last no more than 4 weeks.

At what ages do babies have growth spurts?

SGH lists around 7 to 14 days, 2 months, 4 months and 6 months. HealthHub gives around 2 to 6 weeks, 3 months and 6 months. SGH also says the timing is highly individual, so your baby may not match either list.

Does cluster feeding mean my milk supply is low?

On its own, no, says NHS Grampian. Look at weight gain and nappies instead. SGH says a baby who seems satisfied after feeds and wets 6 to 8 nappies a day is feeding enough.

Should I give water or formula during a growth spurt?

Don't give plain water. If your baby isn't getting enough fluids, NUH says to offer more expressed breast milk or formula. HealthHub says frequent breastfeeds raise your supply to meet your baby's needs. If you're thinking about adding formula, talk it through with your doctor or a lactation consultant first.

Can a growth spurt affect my baby's sleep?

Yes. HealthHub lists a growth spurt as one cause of sleep regression, with signs like fussiness, more night waking and less napping. It says regressions are temporary, and that babies keep having them up to age 2 as they grow and reach milestones.