Corrected age, not the birthday

Weaning advice for term babies is built around six months from birth. For a baby born early, the number that matters is corrected age — age counted from the original due date. NICE guideline NG72 tells clinicians to explain that a child's developmental corrected age, calculated from the due date rather than the birth date, is used for the first two years when assessing functional and developmental skills. The American Academy of Pediatrics gives the same advice on HealthyChildren.org.

Eating solid food is exactly that kind of skill. It needs head control, trunk control, hand-to-mouth coordination and a mature enough swallow, and none of those arrive on the birth certificate's schedule.

The window Bliss gives

Bliss, whose weaning guidance for premature babies was written with dietitians and parents, sets out three markers.

Around five months corrected is the youngest age at which a premature baby may show cues that they are ready. Before that they probably have not developed the skills needed for solid food.
Around six months corrected is when many babies are ready to begin. Go by cues, and if your baby is not ready it is fine to leave it another week or two.
Seven months corrected without readiness cues is the point at which Bliss says to contact your health visitor for advice.

That is a window rather than a date, and it is the answer to the question people actually ask.

The cues that count

Bliss says to wait until you see three or four of these before trying:

Your baby can sit up by themselves, needing only a little support.
They can hold their head up easily and keep it upright while sitting.
They explore objects with their fingers, hands and mouth.
They reach and grasp for food, or open their mouth when food is offered.
They are beginning to bite and chew toys.

The cues that do not count

Bliss is unusually direct about the four things commonly mistaken for readiness, and says there is no evidence for any of them.

Drinking more milk. Usually a growth spurt. More milk is the right response.
Waking more at night. Also a growth spurt or a developmental stage — and Bliss notes studies show weaning does not help babies sleep longer.
Reaching a certain weight. There is no weight at which weaning should start.
Having teeth. Teeth vary enormously and are not connected to readiness for solids.

Bliss adds a useful nuance: young babies often show interest in other people eating before they are ready. Before five months corrected that is not a useful cue. After five months corrected, it can help confirm readiness alongside the others.

How to start

Bliss suggests choosing a time when your baby is well rested and calm, such as after a nap, and a little while after a milk feed so that they are neither exhausted nor frantically hungry. Somewhere without distractions helps, with the television and phones off, because your baby is learning several new things at once and needs to concentrate.

Offer food for your baby to touch, smell and taste — put it on their plate so they can pick it up and explore it, first by looking, then by feeling, then by trying some. Bliss suggests waiting until the end of the meal to clean your baby's face and hands, because exploring food is part of learning to eat it.

Textures and lumps

Preterm babies who have had tubes, ventilation or long periods without oral feeding can be more sensitive around the mouth and slower to accept texture. Bliss's guidance covers moving on to textured foods deliberately rather than staying on smooth purée, because delaying lumps tends to make acceptance harder later. If your baby gags persistently, refuses all texture, or the process stalls, ask for a referral — neonatal units have speech and language therapists and dietitians who work on exactly this.

Iron, and why it matters more here

Babies born early miss part of the iron transfer that happens in the last weeks of pregnancy, and many have had repeated blood tests as well. Most preterm babies go home on an iron supplement. Bliss's nutrition guidance covers the extra requirements preterm babies have that milk alone does not meet, and iron-containing first foods matter for the same reason. Check with your health visitor or GP how long the supplement should continue — it is one of the commonest things to fall through the gap between hospital and community care.

Milk does not stop

Breast milk or formula remains the main source of nutrition through the first year. Early weaning is about learning to eat, not about replacing milk, and volumes drop only gradually. Allergenic foods are introduced in the same way as for term babies once weaning is under way, one at a time, without long delays.

Who to ask

Your health visitor is the first port of call, and Bliss names seven months corrected without cues as the trigger for contacting them. If your baby had significant gut problems, a long period nil by mouth, a feeding tube at home, or is under a dietitian, ask that team before starting rather than after, because the plan may sensibly differ from the general advice above.

How your baby sits matters

Bliss's weaning guidance treats sitting position as part of the readiness question rather than an afterthought. A baby needs to be upright and stable, with feet supported, before they can safely coordinate taking food from a spoon or their own hand. Preterm babies often need more support in a high chair than their corrected age would suggest, and a rolled towel at each side can be the difference between a baby who can concentrate on food and one who is spending all their effort staying upright. If your baby cannot yet sit with a little support, that is a cue that they are not ready, not a problem to be engineered around.

Two things to let go of

The first is the birthday. Family, friends, apps and baby groups will all be working from the date your baby was born, and for six months or so you will be quietly translating everything back to corrected age. It is worth saying out loud to people, once, so that nobody keeps asking why your baby is behind.

The second is the clock. NICE NG72 says the majority of children born preterm have a good developmental outcome, and weaning is a skill that arrives on its own schedule within a fairly wide normal range. Starting in the sixth month corrected rather than the fifth costs nothing. Starting before your baby has the skills costs a lot of stress on both sides.

Weaning a Premature Baby