Your 5-Month-Old Baby's Development and Milestones

This stage is filled with exciting developments as your 5-month-old baby reaches new milestones in strength, coordination and curiosity. Here are some of the most common 5-month-old baby milestones parents may notice during this exciting stage of development.:

• Growth. During this period, many babies will double their birth weight and continue to grow steadily in length.

• Eyesight and sensory skills. Your baby can now see several feet away and recognise familiar faces across the room. They may prefer bright colours and show greater interest in bold shapes and patterns.

• Movement. Enhanced core strength enables your baby to lift their head and chest during tummy time, push up on their arms, and possibly roll over.

• Cognitive and social development. Your baby may begin to grasp simple cause and effect, such as dropping a toy to observe the outcome. They are becoming increasingly socially aware and enjoy hearing your voice, looking at books and babbling in response.

• Activities. Tummy time, picture books, play mats, and activities like peekaboo and toy exploration can support both movement and brain development for a 5-month-old.

• Nappying. They may go through about 6 or more wet nappies daily. 

• Sleep. 5-month-olds typically sleep 8 to 17 hours in a 24-hour period, including 2 to 3 naps. 

• Health and wellness. Teething often begins this month or in the coming months, and it is normal to observe increased drooling, irritability and chewing behaviours.

Discover more with our guide, which delves deeper into each area and provides gentle, expert-backed suggestions to support your baby's development this month.

Baby Developmental Milestones

The 5-month-old baby developmental milestones often include new motor skills, better coordination and increased social interaction. From enhanced vision to more purposeful movements, each small change supports overall growth and learning.

It’s important to remember that every baby develops at their own pace, and these milestones are simply a guide. If you have any concerns about your baby’s development, your baby’s GP or health visitor is your best resource.

Let’s explore what this month may bring when it comes to physical and cognitive development, and your little one’s growing personality. Plus, discover how to support your baby’s development with our tips below.

Physical Growth: Average Weight and Length of a 5-Month-Old

By the time your baby reaches five months, they have likely come a long way from their newborn days. When it comes to a 5-month-old baby's weight, every child grows at their own pace; however, most have doubled their birth weight by now. 

Babies usually gain weight rapidly during the first 6 months of their lives. This usually starts to slow down when they become more active. 

During your baby’s health and development reviews, the GP or health visitor will weigh and measure them to check they’re on track. Generally, babies are weighed once every month or two during their first year to ensure steady progress. 

The average weight and length for a 5-month-old varies, which is why your baby’s GP or health visitor will track their progress on a baby growth chart to ensure they’re growing steadily, not according to a specific number.

Try our Growth Chart Calculator to track your baby’s progress in a clear, simple way.

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Movement: Your 5-Month-Old’s Motor Skills

Your baby is growing stronger every day and is actively working to develop important core muscles. Around 5 months of age, many babies are able to lift and hold their head and chest steadily while lying on their tummy. Some may even begin to push up higher using their arms or start rocking side to side.

Your baby may start kicking their legs with more purpose or slightly pivoting during tummy time. Although these movements seem small, they are significant building blocks leading to future milestones like rolling over and eventually crawling.

If you’re wondering what motor skills a 5-month-old ‘should’ have, it’s important to remember that every baby develops and moves at their own pace. For now, offering plenty of tummy time is one of the best ways to help your 5-month-old’s gross motor skill development by strengthening their neck, back, and abdominal muscles.

Cognitive Development and Senses

At 5 months, your baby's brain is rapidly developing, and they are becoming more aware of their surroundings. Key milestones might include:

• Increased awareness. You may notice that your baby is beginning to recognise familiar faces and voices, showing excitement or calmness in response.

• Exploration. They may start to explore objects with their hands and mouth, learning about their environment through touch and taste.

• Communication. Your baby may begin to babble and make a variety of sounds, experimenting with their vocal cords.

• Cause and effect. They might start to understand that their actions can cause reactions, such as shaking a rattle to produce sound.

• Vision. Your little one can likely see more clearly now and is attracted to bright colours and contrasting patterns. They may track moving objects with their eyes.

• Hearing. They respond to sounds, turning their head toward voices and enjoying music or rhythmic noises.

Engaging with your baby through talking, singing, and playing supports their cognitive development. You can also provide them with a variety of sensory experiences, like soft toys, music, and safe objects to touch and mouth.

Behavioural Changes of a 5-Month-Old

By 5 months, your little one is becoming more social and emotionally expressive. You may notice more frequent smiles, excited squeals, or frustration when something is out of reach. They might also begin responding differently to familiar versus unfamiliar people and show preferences for toys or routines. These shifts reflect their growing awareness and early emotional development.

Activities & Development Tips for Supporting Your 5-Month-Old

Your 5-month-old is gaining strength, coordination and curiosity every day. So, if you’re wondering how to entertain a 5-month-old, there are many daily activities for babies that are not only fun but also support their development through movement and interaction.

One of the most beneficial activities for 5-month-olds (and babies of all ages) is tummy time. Give your baby the opportunity for tummy time about two or three times a day while they are awake and supervised to help build strong neck, back, and shoulder muscles.

What else to do with a 5-month-old? Here are some simple 5-month-old baby activities that can help your little one build strength and social skills:

• Play daily. Make funny faces, play peekaboo, shake a rattle or show new toys. You can play during diaper changes, bath time or neighbourhood walks, taking every opportunity to interact with your little one.

• Talk and sing. Chat to your baby and respond to their babbling, narrate your day and activities and sing nursery rhymes. These back-and-forth moments help build language skills.

• Read together. Picture books featuring bold colours and large images support visual and language development.

• Encourage social time. Allow your baby to meet other parents or babies if they are comfortable, but be attentive to signs of overstimulation.

• Explore textures and sounds. Give your little one toys that crinkle, rattle or feel interesting—they’ll love experimenting with new sensations.

These early interactions aren’t just fun, but they also support your baby’s brain, body, and social-emotional growth.

What ‘Should’ a 5-Month-Old Be Doing?

By now, you may have settled into a rhythm that works well for you and your baby. But if you're still wondering what a 5-month-old should be doing, here’s a quick look at what your baby’s day might include.

And below, we’ll go into more detail on their sleep habits, feeding, nappy changes, teething and more.

How Much and How Often Should a 5-Month-Old Eat?

Sometime around 5 months old, your baby might go through a growth spurt, making them hungrier than usual. Your little one might want to feed more often during growth spurts, and seem fussier than usual. Keep following those hunger cues and feed on demand to ensure that they are getting enough sustenance. If you’re breastfeeding, keep going.

At 5 months, your baby might be showing more interest in what you're eating—staring at your plate, opening their mouth when a spoon comes near or trying to grab food. This might mean they’re nearly ready to start trying solid foods. It’s generally recommended to wait until your baby is 6 months old before introducing solid foods.

Breast milk or formula is still your baby’s primary source of nutrition. Once they turn 6 months, you can start gradually introducing various soft finger foods or purees alongside their breastmilk or formula. 

Waiting until your baby is around 6 months usually ensures they can sit up with support and hold their head steady, and they have lost the tongue-thrust reflex. 

You may also wonder, how much should a 5-month-old eat? If your baby is formula-fed, they typically require about 150-200ml of formula per kilogram of their weight each day until around six months old. If they’re breastfeeding, simply feed your baby when they show signs of hunger.

As long as your baby produces 6 to 8 wet nappies and at least 2 dirty nappies per day, and is gaining weight consistently, you can be assured that they are getting enough milk.

Once you start weaning your baby, they’ll likely take less formula or breastmilk than usual.

Want more information on your baby’s feeding schedule? Take a look at the baby feeding schedule below for a quick overview. It can help you understand where your 5-month-old might be—and what’s coming next!

What goes in must come out! So next, we’ll look at what’s typical for your baby’s digestion and output at this stage.

Nappying at 5 Months Old?

Your baby’s feeding routine often goes hand in hand with nappy changes, and at 5 months, you may be getting pretty familiar with both.

So, how many wet nappies should a 5-month-old have each day? While the exact number can vary, a baby should have about 6 to 8 wet nappies and at least 2 dirty nappies per day. 

Keep an eye on the consistency and smell of your baby’s poo rather than a strict number of bowel movements. If you notice prolonged diarrhoea, an offensive smell, or your baby seems uncomfortable when having a bowel movement, contact their GP or health visitor.

In addition to tracking output, it's a good time to consider the best nappy fit for your baby. A snug yet comfortable fit helps prevent leaks and keeps your little one dry as they become more active. Pampers Premium Protection nappies are designed with double protection: Instant absorption protects the skin, whilst the Stop & Protect pocket protects against leaks. They are also designed with ultra-soft materials to provide comfort for your baby’s sensitive skin.

Teething

Between 4 and 9 months old, many babies start to get their first teeth. You may notice your baby is drooling, cranky or crying from discomfort during this time. Of course, your baby may get lucky and not feel any pain, but could still have swollen or tender gums. 

Soothe any discomfort by giving them a teething ring made of firm rubber or rubbing their gums with a clean finger. If you notice your little one’s drooling, just wipe their mouth with a clean cloth to prevent a rash.

How Much Sleep Should a 5-Month-Old Get?

Sleep is an essential part of your little one’s routine, just like feeding and nappying. 

So, how long should a 5-month-old sleep at night? Around this time, your baby may be able to sleep for longer at night. Some babies might sleep for 8 hours or longer. Each baby is different, but with any luck, your little one will need fewer nighttime feeds at this stage. 

Now that your little one is sleeping longer at night, you may be wondering, “How much daytime sleep is needed for a 5-month-old?” 5-month-old babies still need a couple of naps and will sleep around three to four hours during the day. Overall, a 5-month-old might sleep around 8 to 17 hours in 24 hours.

If you need some help getting your baby to sleep, read our baby sleep tips to help establish a good bedtime routine.

Your Baby’s Health

At 5 months old, your baby is still developing their immune system, so it’s common to encounter mild illnesses like colds, ear infections, or teething-related discomfort. You might notice symptoms such as fussiness, drooling, a mild fever or disrupted sleep. While these can be a normal part of development, always reach out to your baby’s GP or health visitor if you’re unsure or concerned about any symptoms.

Conjunctivitis

This is when the white of the eye and the inside of the lower eyelid become red and inflamed. Conjunctivitis is itchy and painful, and in most cases, it lasts a week or two. Conjunctivitis is usually caused by an infection, but can also be triggered by an allergy or an irritation to something like smoke. Take your baby to your health visitor, child centre or GP if you think they may have an eye infection, because treatment will likely be required. Conjunctivitis is very contagious, so wash your hands before and after administering any eye drops.

5 Month Checkup and Vaccinations

At 5 months old, your baby typically will not require a check-up unless you have specific concerns. Health reviews are usually scheduled at 6 to 8 weeks and again at 9 to 12 months.

Vaccines are generally not needed at 5 months, as they are usually provided at 8 weeks, 12 weeks, 16 weeks, and again at 12 months, as well as before your child starts school.

5-Month-Old Milestones Checklist

Every baby develops on their own timeline, but here are some common milestones that many parents observe around the five-month mark. 

Use this milestones checklist as a general guide to celebrate your 5-month-old’s progress and to identify areas where they may need a bit more support:

• Can hold head and chest up during tummy time

• Pushes up on arms and may rock while on their tummy

• May start to roll from back to tummy

• Reaches for toys and brings them to their mouth

• Babbles or makes vowel sounds like ‘ahh’, ‘oh’ or ‘eh’

• Responds to familiar voices or their name

• Recognises people and objects across the room

• Shows interest in colourful books or patterns

• May begin trying small tastes of solid foods (if ready)

• Displays early signs of teething (drooling, fussiness, chewing).

If you have any questions or concerns about your baby’s development, your baby’s GP or health visitor can offer personalised guidance and reassurance

To Do’s and Items You’ll Need This Month

As your little one approaches 6 months, they may become more active, curious and eager to explore. Here’s a helpful checklist of things to do this month to support their development and ensure their safety:

• Now that your baby is becoming more mobile, take another look at babyproofing your home to make it as safe as possible for an active baby who’s ready to explore. Here are a few ideas:

  • Tuck away cords and cables

  • Secure heavy furniture or décor that might pull off

  • Cover the sharp edges of tables or shelves

  • Consider installing baby gates near stairs or off-limits rooms.

• Here are some items you might need for your little one this month:

  •  A teething ring made of firm rubber to help your little one with their teething

  • A play mat for tummy time, age-appropriate toys with textures or sounds, and a few favourite baby books

  • Nappies, baby wipes and nappy rash cream.

• Curious about what’s ahead? Get a sneak peek of what’s typical at 6 months old.

The Bottom Line

Your 5-month-old is growing quickly! They are developing new skills, showing more personality, and likely keeping you on your toes. Whether they are reaching for toys, exploring new sounds, or starting to show signs of being ready for solid foods, this month is full of exciting changes.

Every baby reaches milestones on their own timeline. Use this guide to support your baby's development, but trust your instincts. When in doubt, consult your baby’s GP or health visitor, as they are your best resource.

To help make life a little easier while tracking your baby’s growth and nappying needs, download the Pampers Club App for exclusive tools and rewards on all your Pampers purchases.