Breastfeeding
Baby growth spurts: when they happen and what to expect
Last reviewed November 2026 against AAP, CDC, NHS and WHO guidance · Sources
Quick answer
Baby growth spurts commonly happen around 2–3 weeks, 6 weeks, 3 months and 6 months, according to USDA WIC, and usually last a few days. Expect more frequent feeds, shorter gaps and extra fussiness. Breastfed babies nurse more to build supply; formula-fed babies may want about an extra ounce per bottle.
- Common ages
- 2–3 wk, 6 wk, 3 mo, 6 mo
- Usually lasts
- A few days
On this page
When do babies have growth spurts?
USDA WIC lists around 2–3 weeks, 6 weeks, 3 months and 6 months as typical times, and notes your baby may not follow these dates exactly. Some babies have spurts at other times or barely seem to notice them.
What are the signs of a growth spurt?
- Wanting to feed much more often, sometimes every hour
- Cluster feeding in the evening
- Finishing bottles and still showing hunger cues
- Extra fussiness, or changes in sleep for a few days
How should I feed during a growth spurt?
Breastfeeding: follow your baby. Frequent nursing for a few days is how supply rises to meet demand. Formula: if your baby drains the bottle and still seems hungry, the AAP suggests adding about an ounce at a time, and staying at or under about 32 oz (960 ml) a day.
See the age guides for exact amounts: 2-week-old, 6-week-old, 12-week-old, 6-month-old.
When to call your pediatrician
- A rectal temperature of 100.4°F (38°C) or higher in a baby 3 months or younger. The AAP says to call right away, even if your baby seems otherwise well.
- Fewer wet diapers than expected for their age (fewer than 6 a day from about day 5), or dark yellow urine.
- Very sleepy and hard to wake for feeds, floppy, or unusually quiet.
- Refusing feeds, or feeding poorly several times in a row.
- Signs of dehydration: dry mouth, no tears, or a sunken soft spot on the head.
- Forceful or green vomiting, or vomiting after most feeds.
- Red, black (after the first meconium poops) or white/pale gray poop.
- Yellow skin or eyes that spread or deepen, or any yellow color in the first 24 hours.
- Trouble breathing, blue or gray lips, or your baby is limp or very hard to wake: call 911 (or your local emergency number) now.
If something feels wrong, trust that feeling and call. You never need a reason beyond worry.
Questions parents ask
How long do baby growth spurts last?
Usually a few days, according to USDA WIC. If extra hunger goes on for longer, or comes with fewer wet diapers, check in with your pediatrician.
Do formula-fed babies have growth spurts?
Yes. They may want bigger or more frequent bottles for a few days. The AAP suggests adding about one ounce at a time if your baby still seems hungry after a full bottle.
Is there a 4-month growth spurt?
USDA WIC lists 3 months and 6 months as common times. Around 4 months many babies feed differently because they're distracted or waking more at night, which can look similar.
Related guides
- Cluster feeding: what's normal and how to get through itCluster feeding is feeds bunched together, often in the evening. When it happens, how long it lasts, how to tell it from low supply, and how to cope.
- How to tell if your baby is getting enough breast milkSigns a breastfed baby is getting enough: wet and dirty diapers by day, weight gain, swallowing and contentment after feeds, plus the warning signs to act on.
- Baby feeding chart by age: ounces and mlA baby feeding chart from week 1 to 12 months: ounces and ml per feed, feeds per day and daily totals for formula and breast milk, with sources.
Free tools
Sources
Last reviewed November 2026. Numbers are ranges from these public health sources; 1 oz ≈ 30 ml.
- USDA WIC Breastfeeding Support: Cluster Feeding and Growth Spurts
- AAP · HealthyChildren.org: How Much Formula Does My Baby Need?
- CDC: How Much and How Often to Breastfeed
Feedoo Baby shares general information, not medical advice. Every baby is different. If you're worried about feeding, weight gain, diapers or your baby's health, call your pediatrician, midwife or health visitor.