Your baby at five months: development, sitting and getting ready for solids

3-6 months · Development · Reviewed 20 June 2026 · All articles

Five months is a month of gathering energy. Your baby is not quite ready to sit unaided or start solid foods, but they are building toward both with visible speed. Muscles are strengthening, hands are learning to grab with intention, and that familiar voice calling their name is now reliably met with a turned head and a bright-eyed look. If the past few weeks have felt like a plateau, this month tends to shake that feeling: there is a lot going on.

This article walks through what most babies are doing at five months, from physical growth and motor milestones to feeding, sleep and the senses. Every baby moves at their own pace, so these descriptions reflect what is typical rather than a checklist every baby must complete on schedule. When something is worrying you, your health visitor or doctor is always the right person to ask.

Development at a glance

• Typical weight: around 7 to 7.5 kg, though the healthy range is wide
• Typical length: around 63 to 67 cm
• Head control: steady and strong in most babies; little or no wobble when held upright
• Rolling: many babies are rolling in both directions, or working on it; some reach this milestone a little later
• Reaching and grabbing: deliberate, aimed reaching toward objects; two-handed grabbing common
• Passing objects: many babies can transfer a toy from one hand to the other
• Sitting: with support, for short stretches; unsupported sitting usually comes a month or two later
• Recognises their name: turns consistently toward the sound of their own name
• Social: loud, full-belly laughs; early signs of stranger awareness in some babies

Physical development

By five months, the average weight sits around 7 to 7.5 kg for many babies, though healthy weight varies considerably depending on birth weight, genetics and feeding patterns. Your baby's own growth curve, tracked over time, matters far more than any single number. If your baby has been growing steadily along their own line on the centile chart, that is the reassurance to look for.

The most striking physical change this month is what muscles can now do. Head control, which was a major effort at two months and an improvement at three and four, is now largely settled in most babies. Held upright, your baby's head stays steady. Held in a supported sitting position, they can hold their torso fairly upright for a short stretch, which is a real shift from the slumped position of earlier months.

Rolling is a highlight of this period for many families. Most babies who were rolling front to back at four months are now adding back to front, or making visible attempts. Some babies skip one direction or the other entirely and still arrive at crawling on schedule. If your baby is not rolling at five months, it is worth noting but not worrying about in isolation.

Leg strength is also building noticeably. When held standing on a firm surface, many babies now push down and bear a portion of their own weight with some enthusiasm. This is not walking preparation in any direct sense, but it is the same muscles and coordination that will eventually support standing.

Feeding: still milk-only

At five months, the right answer for almost all babies is: continue with milk only. Whether your baby is breastfed, formula-fed or a combination of both, milk continues to provide everything they need at this age. There is no nutritional gap that solid food needs to fill at five months.

The guidance from most health organisations, including the World Health Organization, is to aim for around six months before introducing solid foods. This is not a rigid deadline but a reasonable target that gives the gut, the immune system, and the physical mechanics of eating time to develop fully. Starting before four months is firmly not recommended. Between four and six months is a grey area: some health bodies allow it in specific circumstances, but the default is to wait.

What you can do right now is watch for the three signs of readiness that will tell you, around the six-month mark, that your baby is likely ready to begin:

• Sitting with support: your baby can sit in a high chair or supported seat with their head upright and steady
• Hand-to-mouth coordination: your baby can pick up an object and bring it to their mouth with some accuracy
• Loss of tongue thrust: when something touches the lips or enters the mouth, the automatic reflex to push it back out has faded

These signs tend to come together around six months, not before. Watching for them now means you will recognise them when they arrive, without pressure to rush.

One thing worth noting: increased interest in watching adults eat, or seeming unsatisfied after milk feeds, is sometimes taken as a sign of readiness for solids. Most health guidance clarifies that these behaviours are common in the four to five month period and are not reliable readiness signals on their own.

Sleep

Sleep at five months can feel like unfinished business. The four-month sleep regression, which tends to arrive between three and five months, may still be in progress for some babies, or may have resolved and then re-disrupted. This is normal. The four-month regression is a shift in sleep architecture, not a phase that simply passes: once it happens, it tends to be permanent, meaning your baby now cycles through sleep stages in a more adult-like pattern and may wake between cycles rather than sleeping straight through them.

Typical total sleep over 24 hours at this age falls somewhere between 12 and 16 hours, shared across night sleep and two or three daytime naps. Many five-month-olds do not yet have a predictable nap schedule, and that is entirely normal. Some are beginning to settle into a rough rhythm; others remain variable from day to day.

Longer stretches of unbroken sleep at night are possible at five months, and some babies do achieve them. Others wake once, twice, or more. Both patterns are within normal range. Safe sleep guidance continues to apply: baby on their back, on a firm flat surface, in their own clear sleep space, in the same room as a caregiver for at least the first six months.

Health and senses

Most routine vaccination schedules do not include a dose at exactly five months. In many countries, the primary series runs at two and four months, with the next scheduled dose at six months. It is worth checking your own schedule, as timings vary, and catching up any doses that were delayed.

The senses are sharpening fast this month. A few things to watch for:

• Name recognition: at five months, most babies turn reliably toward the sound of their own name when called from a short distance. This is a meaningful marker of hearing, attention and early language development combined.
• Oral exploration: almost everything that lands in your baby's hands will travel directly to their mouth. This is intentional learning, not just reflex. The mouth is richly sensitive and gives babies detailed information about an object's texture, temperature and shape. Mouthing is also the hand-to-mouth coordination that will later help with eating. Ensure anything within reach is large enough to be safe and free of sharp edges or toxic coatings.
• Mirrors: babies at this age are often fascinated by their own reflection, staring and smiling and reaching out. They do not yet recognise themselves, but the moving, responsive face in the mirror is endlessly compelling.
• Stranger awareness: some babies begin to show early stranger anxiety around now, becoming quieter or more subdued with unfamiliar faces. Not all babies show this at five months; for many it becomes more apparent at six to nine months. It is a healthy sign of social and emotional development.
• Laughter: five months is a prime time for full, loud laughter. Tickling, surprise sounds and familiar games tend to produce the most reliable response.

What comes next: heading toward six months

Six months brings a cluster of significant changes, and the groundwork is being laid right now.

The six-month mark is when most health services schedule a developmental review or check. Depending on where you are, this may include an assessment of gross motor skills, vision, hearing, social responsiveness and weight. It is a good moment to bring any questions about development to a professional, however small they may seem.

Solid foods, if the readiness signs are present, typically begin around six months. If this is on your mind, now is a good time to read broadly and prepare without rushing. There is no benefit to starting earlier than the signs indicate, and a relaxed, curious approach at the beginning tends to produce a smoother experience than a scheduled or pressured one.

Sitting unaided is also approaching. Many babies achieve unsupported sitting somewhere between six and eight months. At five months, what you are seeing is the build-up: the core and back muscles strengthening through tummy time, supported sitting and rolling. Keep offering tummy time daily, even in short bursts, as it continues to do a great deal of work.

Finally, the social and language foundations are advancing quickly. Babbling, if it has not started yet, tends to appear around six months, adding consonant sounds to the vowels and cooing of earlier weeks. Responding to your baby's sounds, copying them back, narrating what you are doing, and reading aloud all feed directly into this development. None of it needs to be formal or effortful; ordinary daily conversation is the input babies are built to receive.

Frequently asked questions

Can my baby start solids at five months?

Most guidelines, including those from the World Health Organization and many national health bodies, recommend waiting until around six months before introducing solid foods. At five months, the majority of babies have not yet developed all the physical readiness signs: the ability to sit with support, good head and neck control, and the loss of the tongue-thrust reflex that automatically pushes food out of the mouth. Watching closely for these signs in the weeks ahead is the best guide.

My baby is not rolling yet at five months. Should I be worried?

Rolling is a skill that develops across a wide window. Some babies roll confidently in both directions by four months; others do not roll consistently until six or seven months. At five months, the absence of rolling on its own is not usually a cause for concern. If your baby also shows very limited movement, is not bearing weight on their legs when held upright, or seems generally floppy, speak with your doctor or health visitor for a fuller assessment.

Why does my five-month-old put everything in their mouth?

Mouthing objects is a completely normal and important part of how babies at this age explore the world. The mouth is highly sensitive and gives babies detailed information about shape, texture, temperature and taste that their hands cannot yet provide on their own. It is also a sign of developing hand-to-mouth coordination, which is one of the early markers that the body is preparing for solid foods. Ensure any object within reach is large enough not to be a choking hazard and free of sharp edges or toxic materials.

How much sleep should a five-month-old get in a day?

Total sleep needs at five months are typically in the range of 12 to 16 hours across a 24-hour period, including naps. How that sleep is distributed varies widely between babies. Some settle into a rough pattern of two or three daytime naps and a longer stretch at night; others remain unpredictable. A four-month sleep regression can still be resolving at this age, so disrupted nights are common and do not indicate a problem with your baby's sleep development.