Infant Safety: The Non-Negotiables

Most of what a new parent worries about turns out not to matter much. A small number of things matter a great deal, and they are worth knowing before you need them rather than after.

This page is general information, not medical advice, and it cannot assess your baby. Where anything here differs from what your paediatrician, midwife or health visitor tells you, follow them — they know your child and this page does not.

Safe sleep

The single highest-value thing on this list. Public-health guidance across many countries converges on the same core points for reducing the risk of sudden infant death:

• On the back, every sleep. Naps included, not just at night, and by everyone who puts the baby down.
• On a firm, flat surface designed for infant sleep, with a fitted sheet and nothing else in it.
• Nothing loose in the sleep space — no pillows, duvets, bumpers, positioners, or soft toys.
• Room-sharing without bed-sharing is widely recommended for the early months.
• Not too warm, and a smoke-free environment.

The sleep guidance elsewhere on this site — the sleep schedule tool and its wake windows — is about when a baby sleeps. It says nothing about how they should be placed, and none of its figures override any of the above.

No honey before twelve months

This one is specific, well-established, and surprisingly little known. Honey can contain Clostridium botulinum spores, which an adult gut handles without difficulty and an infant gut does not. In babies under one year those spores can germinate and produce toxin — infant botulism, which is serious and requires hospital treatment.

It applies to all honey, including raw, organic, local and pasteurised, and to foods containing honey — some cereals, baked goods, and honey-sweetened teething products. It also applies to the old practice of putting honey on a dummy or on sore gums.

After the first birthday the gut has matured enough that honey is fine. Before it, there is no safe amount and no safe type.

Feeding: the figures are guides, not targets

The feeding amount calculator uses the common paediatric rule of roughly 150 ml of formula per kilogram of body weight per day, capped near 960 ml (about 32 oz). For a 5 kg two-month-old that is about 750 ml a day across six feeds — roughly 125 ml a feed.

What matters more than the number is that babies feed on cues. A baby who is consistently taking much less or much more than the guide, who is not gaining weight, or who seems persistently unsettled after feeds, is a reason to speak to a health professional rather than to adjust the arithmetic.

Two hard rules worth stating: formula is made up exactly as the manufacturer directs — over-concentrating it is dangerous, and diluting it to make it last is dangerous in a different way — and cow's milk is not a drink for babies under one year, though it can be used in cooking from six months.

Percentiles are a trend, not a grade

The growth percentile tool places a single measurement against WHO-style reference bands: a 6-month-old boy at 7.9 kg sits right at the median, at 6.4 kg he is in the 3rd–15th band, at 9.5 kg the 85th–97th.

None of those is a good or a bad result. Healthy babies occupy the whole range, and a baby tracking steadily along the 15th percentile is doing better than one that has dropped from the 85th to the 50th. The trend across your paediatrician's own chart is the thing that matters, and a single figure from any website is orientation at best.

When to seek help rather than search

General guidance across health services flags a few things as reasons to seek medical advice promptly rather than wait, particularly in young infants:

• A fever in a baby under three months.
• Difficulty breathing, or breathing that looks like hard work.
• Unusual floppiness, or being very difficult to wake.
• Not feeding, or markedly fewer wet nappies than usual.
• A rash that does not fade when pressed.
• Any sudden change that worries you and that you cannot explain.

That last one is deliberate. Parents are frequently right that something is wrong before they can say why, and no list substitutes for that. Health services would far rather see a well baby than miss an unwell one.

The other everyday ones

• Car seats are the highest-risk everyday item and the most commonly fitted wrong. Rear-facing for as long as the seat allows, correct for the child's current weight and height, and checked by someone trained if you can — many retailers and services offer it free.
• Never leave a baby unattended on a raised surface — changing tables and beds — even before they can roll. The first roll is always unexpected.
• Bath water is checked with an elbow or a thermometer, and babies are never left alone in the bath for any length of time.
• Small objects and cords. Blind cords in particular are a well-documented strangulation hazard; keep cots away from windows.
• Second-hand equipment is fine for most things and not for car seats, whose history you cannot verify.

What this site is for

The calculators here work out feeding volumes, sleep ranges, nappy quantities, growth bands, due dates and first-year costs. They are arithmetic and orientation — genuinely useful for planning and budgeting, and useless for assessing whether a particular baby is well.

Every one of them is an estimate built on population averages. Your paediatrician, midwife or health visitor is the source for anything about your child specifically, and the purpose of a page like this is to make sure the right questions get asked of them.

Things that sound safe and are not

A few items marketed for babies sit against mainstream safety guidance, and it is worth knowing which:

• Cot bumpers, sleep positioners and wedges. Widely sold and widely advised against — they add loose material to a sleep space that guidance says should be empty.
• Inclined sleepers. Several have been subject to recalls and safety warnings; sleep surfaces should be firm and flat.
• Loose blankets and duvets in the early months. A correctly-sized sleeping bag is the usual alternative.
• Amber teething necklaces. These present a strangulation and choking risk, and are advised against by health bodies.
• Second-hand car seats from an unknown source, whose collision history you cannot verify.

The general pattern is that a product being on sale for babies is not evidence that it aligns with safety guidance, and the guidance is easy to check with your health visitor.

Everyone who cares for the baby needs the same information

Safe sleep in particular fails at the edges — a nap at a grandparent's house, a childminder's first week, a partner who was not at the appointment where it was explained.

Saying it out loud to everyone who will put the baby down, including for short naps, is worth the small awkwardness. Most people who do it differently are working from advice that was current when their own children were small, and are entirely willing to change once told.