Your baby, week by week

Week 1

In week 1, your newborn is mostly eating and sleeping, feeding 8-12 times a day and sleeping around 14-17 hours total in short stretches. It is completely normal for them to be sleepy, to lose a little birth weight in the first few days, and to seem to do little besides feed, sleep, and fill diapers. This is exactly what a healthy first week looks like.

Week 2

At 2 weeks old, your baby is feeding 8 to 12 times a day, sleeping in short stretches that add up to most of the day, and should be back to (or near) birth weight around now. Frequent feeding, fussy evenings, and lots of diapers are all normal.

Week 3

At 3 weeks old, most babies are feeding 8 to 12 times a day, sleeping 14 to 17 hours total in short stretches, and many start to seem fussier in the late afternoon and evening. This is a normal, demanding newborn phase, and your baby has likely passed their birth weight by now.

Week 4

At 4 weeks, most babies are eating more at each feed (around 3 to 4 oz, or nursing every 2 to 3 hours), sleeping 14 to 17 hours across the day and night in short stretches, and starting to be alert for slightly longer windows. Your baby is nearly one month old and likely back above birth weight.

Week 5

At 5 weeks old, most babies are feeding 8 to 12 times a day, sleeping in short stretches around the clock, and starting to be more alert and responsive between feeds. Many are nearing their first real social smile, though there is a wide normal range for when it appears.

Week 6

At 6 weeks old, many babies hit a growth spurt, so expect a few days of extra hunger and cluster feeding. This is also when the first real social smiles often appear, and when fussiness and crying tend to peak before easing in the coming weeks. Heading toward the 2-month checkup, look for your baby briefly tracking your face and making cooing sounds.

Week 7

At 7 weeks, many babies are feeding every 2 to 3.5 hours, sleeping around 14 to 17 hours total across the day and night, and starting to give those first real social smiles. Every baby is a little different, so think in ranges, not exact dates.

Week 8

At 8 weeks, most babies are taking in more milk per feeding, may give you a longer stretch of sleep at night, and are getting noticeably more social with real smiles and cooing. This week often lines up with the 2-month well-child visit and first round of vaccines.

Week 9

At 9 weeks, most babies take 24-32 oz of milk a day across 6-8 feeds and sleep 14-16 hours total, with one slightly longer stretch starting to appear at night.

Week 10

At 10 weeks, most babies are eating about 24 to 32 oz a day, sleeping 14 to 17 hours total, and starting to reward you with social smiles and longer stretches of alertness. Development is best understood as a range, not a weekly schedule.

Week 11

At 11 weeks (about 2.5 months), many babies are awake for longer, smiling socially, and taking bigger, less frequent feeds — usually 24-32 oz of milk a day and sleeping around 14-16 hours total, often with a longer stretch at night.

Week 12

At 12 weeks, many babies feed every 3-4 hours (about 24-32 oz of formula a day or nursing on demand), sleep around 14-16 hours total with longer night stretches, and are increasingly alert, smiley, and vocal.

Week 13

At 13 weeks, most babies take 4-6 oz per feeding about every 3-4 hours and sleep around 14-16 hours total, often with a longer stretch at night.

Week 14

At 14 weeks, many babies are taking longer, more efficient feeds, stretching their longest sleep at night, and getting noticeably more social with smiles, coos, and steady head control. Development is best understood as a range building toward the 4-month checkup, not a fixed weekly schedule.

Week 15

At 15 weeks, most babies take in about 25-32 oz of milk a day across 5-7 feeds and sleep roughly 14-16 hours total, often with one longer stretch at night and 3-4 naps. Development is best measured against the 4-month checkup, not week by week.

Week 16

At 16 weeks, most babies take about 4-6 oz per feeding 5-6 times a day, sleep 14-16 hours total with 3-4 naps, and are smiling, cooing, and reaching for things around this age.

Week 17

At 17 weeks, many babies feed about 4-6 oz every 3-4 hours, sleep roughly 14-15 hours a day across 3-4 naps, and are increasingly smiley, chatty, and curious about the world.

Week 18

At 18 weeks, most babies take about 24-36 oz of breast milk or formula a day across 5-6 feeds and sleep roughly 14-16 hours total, often with longer night stretches and 3-4 daytime naps.

Week 19

At 19 weeks, most babies take about 24-32 oz of breast milk or formula a day across 5-6 feeds, sleep around 12-15 hours total with 3 naps, and are getting strong at grabbing, rolling, and pushing up on their arms.

Week 20

At 20 weeks (about 5 months), most babies take 4-5 feedings a day, sleep around 14-15 hours total across 2-3 naps, and stay awake for roughly 2-2.5 hours between sleeps. Many are rolling, grabbing for toys, and babbling, but exact timing varies widely from baby to baby.

Week 21

At 21 weeks (about 5 months), many babies take 24-32 oz of milk a day, sleep around 14-15 hours total, and stay awake for roughly 2 to 2.5 hours between naps.

Week 22

At 22 weeks, most babies are wide awake and social, rolling or working toward it, and may be showing early signs of readiness for solids as the 6-month checkup approaches. Milk is still the main source of nutrition, with babies typically taking 24 to 32 oz of breast milk or formula across the day.

Week 23

At 23 weeks (roughly 5.5 months), many babies are sitting with support, rolling both ways, and grabbing for everything in reach. Most are still on breast milk or formula, with the 6-month checkup and possibly first solids just ahead.

Week 24

At 24 weeks (around 6 months), most babies take 24-32 oz of milk a day, sleep about 12-15 hours total with 2-3 naps, and many are ready to begin solid foods.

Week 25

At 25 weeks (about 6 months), most babies take 24-32 oz of breast milk or formula a day, may be starting first solids, and sleep around 12-15 hours total with 2-3 naps.

Week 26

At 26 weeks (about 6 months), babies typically drink 24-32 oz of breast milk or formula a day and may be starting first solids, while sleeping around 12-15 hours total with two to three naps.

Week 27

At 27 weeks (about 6 months), most babies drink 24-32 oz of breast milk or formula a day plus 1-2 small solid meals, sleep around 12-15 hours total, and are learning to sit with little or no support.

Week 28

At 28 weeks (about 7 months), most babies take 24-32 oz of breast milk or formula a day plus 1-2 small solid meals, sleep around 12-15 hours total, and stay awake 2.5-3.5 hours between sleeps.

Week 29

At 29 weeks (about 7 months), many babies take 24-32 oz of breast milk or formula a day plus 1-2 small solid meals, and sleep around 12-15 hours total with 2-3 naps.

Week 30

At 30 weeks (around 7 months), many babies eat 2-3 small solid meals a day alongside 24-32 oz of breast milk or formula, sleep about 12-15 hours total over a night plus 2-3 naps, and stay awake for roughly 2.5-3.5 hours between sleeps.

Week 31

At 31 weeks (about 8 months), many babies are sitting steadily, eating solids two to three times a day alongside breast milk or formula, and sleeping roughly 11-12 hours at night plus two to three naps. Every baby moves at their own pace, so treat these as ranges, not deadlines.

Week 32

At 32 weeks (around 8 months), most babies take 24-30 oz of breast milk or formula a day alongside 2-3 solid meals, sleep about 12-15 hours total with two naps, and are busy practicing sitting, scooting, and babbling.

Week 33

At 33 weeks (roughly 8 months), most babies sleep about 12 to 15 hours total across the day, take 2 naps, and are settling into two or three solid-food meals alongside breast milk or formula. Sitting steadily and babbling are common around this age.

Week 34

At 34 weeks (around 8 months), most babies nurse or take formula 4-5 times a day plus 2-3 meals of solids, sleep about 13-15 hours total, and are working on sitting steadily and picking up small objects.

Week 35

Around week 35, many babies eat three solid meals a day alongside 24-30 oz of breast milk or formula, sleep about 13-14 hours total with two naps, and are busy crawling, pulling up, or sitting steadily.

Week 36

At 36 weeks (around 9 months), many babies are crawling or cruising, eating three solid meals plus 24-30 oz of breastmilk or formula a day, and sleeping about 14 hours total with two naps.

Week 37

At 37 weeks (about 8.5 months), many babies eat three solid meals plus 24-30 oz of breast milk or formula a day, sleep roughly 14 hours total, and are sitting and starting to crawl or scoot.

Week 38

At 38 weeks (about 9 months), many babies eat 3 solid meals a day plus 24-30 oz of breast milk or formula, sleep around 12-15 hours total with 2 naps, and are working on sitting, crawling, and pulling to stand.

Week 39

At 39 weeks (about 9 months), many babies are crawling or pulling to stand, eating 3 solid meals a day plus 24-30 oz of breast milk or formula, and sleeping around 12-14 hours total with two naps.

Week 40

At 40 weeks (around 10 months), many babies are pulling to stand and cruising along furniture, eating three meals of solids plus about 24-30 oz of breast milk or formula a day, and sleeping roughly 13-14 hours total with two naps.

Week 41

At 41 weeks (about 10 months old), many babies are crawling well, pulling to stand, and cruising along furniture. They typically eat 3 solid meals a day plus roughly 24 ounces of breast milk or formula, and sleep around 13 to 14 hours total with two naps.

Week 42

At 42 weeks (around 10 months), many babies eat 3 solid meals plus 24-30 oz of breast milk or formula a day, sleep about 12-15 hours total with 2 naps, and are busy crawling, cruising, and babbling.

Week 43

At 43 weeks (about 10 months), many babies are crawling well and pulling up or cruising along furniture, eating three meals plus a couple of snacks alongside about 24 oz of breast milk or formula a day.

Week 44

At 44 weeks, most babies (around 11 months) are eating three solid meals plus 16 to 24 oz of breast milk or formula a day, sleeping roughly 12 to 15 hours total with two naps, and cruising along furniture or taking first wobbly steps. Development varies widely at this age, so use these as ranges, not deadlines.

Week 45

At 45 weeks (about 11 months), most babies are eating three meals plus snacks alongside breast milk or formula, sleeping roughly 13-14 hours a day across two naps, and busy cruising along furniture. Development is best measured as a range heading toward the 12-month checkup, not week by week.

Week 46

At 46 weeks (about 10.5 months), most babies eat 3 meals plus snacks alongside roughly 16-24 oz of breast milk or formula, sleep about 12-14 hours total with 2 naps, and are busy cruising along furniture and babbling.

Week 47

At 47 weeks (around 11 months), most babies eat 3 meals plus snacks alongside about 16-24 oz of breast milk or formula a day, and sleep roughly 12-15 hours total with two naps.

Week 48

At 48 weeks (about 11 months), most babies eat 3 meals plus snacks alongside roughly 16-24 oz of breast milk or formula, sleep around 11-14 hours total, and are cruising or taking first steps.

Week 49

At 49 weeks (about 11 months), most babies are pulling up, cruising along furniture, eating a wide range of finger foods, and babbling with real intention. This is the home stretch before the 12-month checkup, where your pediatrician will check growth and a set of milestones.

Week 50

At 50 weeks (about 11.5 months), most babies eat three meals plus snacks with breast milk or formula, sleep around 11-14 hours total over two naps, and stay awake 3-4 hours between sleeps.

Week 51

At 51 weeks (almost 12 months), most babies eat 3 meals plus 1-2 snacks alongside about 16-24 oz of breast milk or formula, sleep around 11-14 hours total, and are cruising, standing, or taking first steps — all within a wide normal range.

Week 52

At week 52 (12 months), many babies eat three meals plus snacks, may begin transitioning to whole milk, and sleep about 11-14 hours total with one or two naps. The 12-month checkup is a key milestone check.