8-Month-Old Milestones: Development, Growth, Speech, and Sleep

Your baby has figured out how to get places. Whether it's a proper crawl, an army-shuffle, or a determined roll across the rug, eight months is when the room stops being a fixed set of things to look at and becomes territory to cover. Blink and they're at the bookshelf.

This is also the age when your baby suddenly needs to know exactly where you are at all times. The two things are connected. Here's what most 8-month-olds are doing, grouped the way your pediatrician thinks about it, with the sources behind them.

Milestones at a glance

Most 8-month-olds sit steadily without support, are crawling or close to it, pull up to stand on furniture, babble long strings of sounds, and light up during peekaboo.¹ There's no CDC checklist made specifically for month 8, so pediatricians read this age as the stretch between the 6-month and 9-month checkpoints.

The CDC lists are worth understanding. Since 2022 each listed skill is something about 75% of babies can do by that age, not the average.² So if your 8-month-old is doing most of the 6-month items comfortably and starting to show the 9-month ones, they're squarely on track, with a wide, normal range of timing on either side.

What should an 8-month-old be doing?

Pediatricians watch four rough tracks maturing at once: big movements, hand skills, sounds, and social awareness. Here's each one at eight months.

Movement and physical development

Sitting without support. By now most babies sit steadily on their own, hands free to play, and can stay upright without toppling.¹ Many can also get themselves into a sitting position from lying down.

Crawling, or something like it. Eight months is prime crawling territory, though plenty of babies scoot, roll, or army-crawl first, and some skip classic crawling entirely.³ The point is that they've found a way to move toward what they want.

Pulling to stand. Grabbing the edge of the couch and hauling up to standing is a big one this month.³ Getting back down is the harder half, which is why you'll see a lot of babies stuck upright and complaining about it.

Two safety notes now that your baby is mobile and vertical. Lower the crib mattress before they pull up in it, and sweep the floor for small objects, since everything still heads for the mouth.

Hands and fine motor skills

The pincer grasp is coming in. Around this age babies start picking up small things by pressing thumb and finger together instead of raking with the whole hand.³ It starts clumsy and gets neater over the next couple of months, and it's exactly the skill that makes self-feeding possible.

Banging two objects together. Holding a block in each hand and knocking them together is a real cognitive milestone, one the CDC lists at the 9-month checkpoint.¹ Your baby is learning cause and effect.

Dropping things on purpose. Deliberately releasing a toy over the side of the high chair, over and over, is not misbehavior. It's your baby practicing controlled release and testing that dropped things still exist somewhere below.

Speech and language

Long babble strings. Expect repeated syllables like "bababa," "dadada," and "mamama," now strung into longer runs with real intonation.¹ It sounds like talking, but babies generally don't attach meaning to "mama" or "dada" until closer to a year, so you're hearing rehearsal.

Responding to their name. By eight months most babies turn or look when you say their name.¹

Understanding "no." Your baby is starting to read your tone and may pause or look at you when you say no, even if they carry on toward the outlet a second later.

Maybe a wave. Some 8-month-olds start waving bye-bye or lifting their arms to be picked up, both early ways of communicating with gestures before words arrive.¹

Social and emotional

Separation anxiety shows up. This is the age when your baby may cry the moment you leave the room and cling harder than they used to.¹ It's driven by object permanence, the new understanding that you still exist when you walk out of sight, paired with a strong preference for keeping you in it. It's a sign of healthy attachment, not a setback.

Stranger wariness peaks. Unfamiliar faces, even a grandparent seen occasionally, may get a suspicious stare or tears. That's normal for this stretch.

Loving peekaboo. Games where you disappear and come back are a favorite right now, and they're not just fun.¹ Peekaboo rehearses exactly the lesson your baby is working on: things (and people) come back.

Finding hidden things. Cover a toy with a cloth and your baby will now look for it instead of assuming it's gone.¹ That's object permanence again, the same leap behind the clinginess.

How much sleep does an 8-month-old need?

About 14 hours in 24, typically around 10.5 hours at night plus 3 to 3.5 hours of daytime sleep.⁴ Wake windows land near 2 hours 45 minutes, shortest before the first nap and a touch shorter again before bed.

Eight months sits right in the middle of the 3-to-2 nap transition, so many babies are on two naps and others are wobbling between two and three. This is also when the 8-month regression tends to hit, powered by the same separation anxiety and new motor skills you're seeing all day. We break the whole day down, with a sample schedule and how to handle the regression, in our 8-month-old sleep schedule post, and the numbers for every age live in our wake windows chart.

Feeding an 8-month-old: finger foods and self-feeding

Most 8-month-olds are eating two to three solid meals a day alongside their milk feeds, and finger foods are the headline change.⁵ As the pincer grasp comes in, your baby wants to feed themselves, and soft pieces they can pick up (banana, well-cooked sweet potato, small bits of toast) give them the practice. Milk is still a major part of their nutrition; solids are building alongside it, not replacing it yet.

Keep offering the common allergens rather than pulling them out once they're in. The LEAP trial found that regularly feeding peanut to high-risk infants from 4 to 11 months cut their chance of peanut allergy by roughly 80% by age 5.⁶ On that evidence, national guidelines recommend introducing peanut, egg, and other allergens early and keeping them in the diet in age-appropriate forms.⁷ Offer new foods earlier in the day, when it's easier to watch for a reaction.

You can offer water with meals, but keep it to no more than about 1 cup (8 ounces) a day for 6- to 12-month-olds, since milk still supplies most of the fluids they need.⁸ A few sips from an open cup is skill-building at this point. Our feeding guide has amounts and frequencies by age.

A note on teeth: the central incisors (bottom two, then top two) often arrive around now, with the lateral incisors not far behind, though the range is genuinely wide and a toothless 8-month-old is perfectly normal.⁹ First teeth don't change the finger-food plan; babies gum soft foods just fine.

Growth at 8 months

Weight gain has slowed compared to the early months. This month most babies add somewhere around 1 pound and grow roughly half an inch.¹⁰ A little more or less is normal, and gains keep tapering through the rest of the first year.

Your pediatrician plots height, weight, and head circumference against the WHO growth standards at well visits.¹¹ What they're watching is the curve your baby follows over time, not a single number. A baby who has tracked the 25th percentile since birth and keeps tracking it is growing exactly as they should.

8-month milestone checklist

Development is a range, not a schedule, and no two babies hit every item the same week. Around 8 months, most babies can:

• Sit steadily without using their hands for support
• Crawl, scoot, or otherwise get across the floor
• Pull up to stand at furniture
• Start using thumb and finger together (the early pincer grasp)
• Bang two objects together
• Deliberately drop and release things
• Babble long strings like "bababa" and "dadada"
• Turn to their name
• Look for a toy that's been hidden
• Show clinginess or wariness with strangers
• Smile and laugh during peekaboo

8-month red flags: when to call the doctor

Every baby is on their own timeline, but a few signs around this age are worth raising with your pediatrician. It's reasonable to check in if, as your baby approaches 9 months, they¹:

• Aren't bearing weight on their legs with support
• Don't sit with help
• Aren't babbling ("mama," "baba," "dada")
• Don't respond to their own name
• Don't seem to recognize familiar people
• Don't look toward things you point at
• Aren't moving things from one hand to the other
• Seem unusually stiff or unusually floppy
• Lose skills they once had

No single item on its own means something is wrong, and you know your baby better than a list does. If something feels off, the "act early" move is to ask sooner rather than wait and see.²

How to support development at 8 months

Play the games your baby is obsessed with. Peekaboo and hiding a toy under a cloth aren't just for fun; they're practicing object permanence, the concept behind both the clinginess and the crib protests right now.

Practice narrated goodbyes. When you leave the room, say "I'll be right back," and come back cheerfully. Small, low-stakes separations teach your baby that you return, which softens the anxiety over time.

Set up safe places to pull up. Give your baby a sturdy surface to haul up on and practice getting back down. Guiding their hands as they lower to sitting is exactly the skill that ends the "stuck standing in the crib" phase.

Let them make a mess with food. Handing your baby soft finger foods builds the pincer grasp and self-feeding at once. It's slower and messier than spoon-feeding, and it's worth it.

nappi tracks feeds, naps, and milestones in one place, so the 9-month well visit becomes a matter of glancing at what actually happened instead of reconstructing it from memory.

Frequently Asked Questions

My 8-month-old isn't crawling yet. Should I worry?

Usually not. Crawling has a wide normal range, and plenty of babies scoot, army-crawl, or skip crawling and go straight to pulling up and cruising.³ What matters more is that your baby is finding some way to move and bears weight on their legs when you hold them up. If neither is happening as 9 months approaches, mention it at the next visit.

Why has my 8-month-old suddenly become so clingy?

That's separation anxiety, and it tends to show up right around now. Your baby has learned that you still exist when you leave the room (object permanence), and they'd much rather you stay. It's a normal sign of healthy attachment.¹ Peekaboo and short, cheerful goodbyes help them learn that you always come back.

Can my 8-month-old eat finger foods without teeth?

Yes. Babies gum soft foods effectively, and the first teeth are for biting, not grinding.⁹ Soft, pick-up-able pieces are ideal for practicing the pincer grasp whether or not any teeth have arrived.⁵

Is "dada" or "bababa" a real word at 8 months?

Not yet. At this age long babble strings are practice with sounds, not words with meaning attached. Babies typically connect a word to a specific person or thing closer to their first birthday.¹ The babbling is the important groundwork.