What the Real Range of Teething Timelines Looks Like and Why Your Baby’s Pattern May Be Different
In this article
- The standard teething timeline
- Why many babies follow a different timeline
- Teeth arriving out of orders
The Standard Teething Timeline: What Guidelines Say
According to the NHS, most babies begin teething at around six months, though it can start as early as three months or as late as twelve months. The typical eruption sequence starts with the lower central incisors (the two bottom front teeth), followed by the upper central incisors (NHS).
From there, the expected order is roughly as follows:
· Upper lateral incisors: around 9–11 months
· Lower lateral incisors: around 10–12 months
· First molars: 12–16 months
· Canines: 16–20 months
· Second molars: 20–30 months
By around age three, most children have a full set of twenty primary teeth (NHS; Johns Hopkins Medicine).
These timelines are useful as a rough guide, but they represent averages drawn from large populations. In practice, individual babies can sit comfortably outside these windows and still be developing perfectly normally.
Why Many Babies Follow a Different Timeline
Parents often worry when their baby’s teeth arrive earlier, later, or in a different order to what they have read. Online forums are full of parents asking whether it is normal for their two-month-old to be teething, or whether they should be concerned that their ten-month-old still has no teeth at all.
Research shows that the timing of tooth eruption is strongly influenced by genetics. A study published in BMC Pediatrics found that babies of longer gestation and larger size at birth tended to get their first tooth earlier and have more teeth by age one (Feldens et al., 2015). A different study suggests tooth eruption timing is strongly influenced by genetics. Heritability estimates are high, meaning family members’ teething patterns often play a role, though individual timelines can still vary considerably (Pillas et al., 2010).
Beyond genetics, factors such as birth weight, premature birth, and early nutritional status can all influence when teeth appear. Low birth weight babies, for example, often show fewer erupted teeth in the first twelve months compared to babies born at a typical weight (Aktoren et al., 2010). None of these variations are signs of a problem on their own. They simply reflect the wide range of normal development.
Early Teething: What It Actually Means
Some babies start showing signs of teething as early as two or three months. Parents often notice increased drooling, hand-chewing, and fussiness at around two to four months and assume teething has started. In reality, many of these behaviours are part of normal developmental oral exploration and self-soothing, even when no teeth are imminent (NHS).
That said, genuinely early teething does happen. Some babies are even born with teeth, known as natal teeth, which occurs in roughly one in every two to three thousand births (Cunha et al., 2001). Early teething on its own is not a cause for concern, though it can mean parents need to think about gum comfort sooner than expected.
For babies who are teething early but are too young to hold a teether independently, parents can gently rub the gums with a clean finger or offer a chilled, firm object to mouth on. As babies develop their grasp, some parents choose hard resistive teething biscuits such as Bickiepegs, which provide a firm surface for chewing and oral exploration.
Late Teething: When Waiting Is Normal and When to Ask
Late teething is one of the most common sources of parental anxiety. If your baby reaches eight, ten, or even twelve months without a single tooth, it is natural to wonder whether something is wrong. In the vast majority of cases, the answer is no.
The NHS notes that some babies do not get their first tooth until after 12 months, and this can still fall within healthy development. However, if your baby has no teeth by around 18 months, it is worth speaking with a dentist or GP to rule out any underlying causes. Conditions that can delay eruption include nutritional deficiencies, certain genetic conditions, and hormonal factors, though these are uncommon (Cleveland Clinic).
The important thing to remember is that many babies manage soft and appropriately prepared foods very well even before teeth appear. Babies are remarkably good at managing soft and mashed foods with their gums, and many parents practising baby-led weaning find their toothless babies handle a surprising range of textures. Offering foods that encourage chewing, even before teeth appear, supports oral motor development and prepares the jaw muscles for the teeth that will eventually come.
Teeth Arriving Out of Order: Should You Worry?
While the standard says bottom front teeth first, then top front teeth, plenty of babies have other plans. Some parents notice canines appearing before lateral incisors, or top teeth arriving before bottom ones. Others see several teeth come through at once rather than in a neat sequential pattern.
Teeth erupting out of the expected order is very common and almost never a sign of a dental problem. Eruption timing depends on how quickly individual tooth buds develop beneath the gums, which is why sequence variations are common. The American Academy of Pediatric Dentistry notes that variations in eruption sequence are normal and typically resolve as the full set of primary teeth comes in. By age three, most children have all twenty baby teeth regardless of the order they appeared.
What matters more than order is that your baby’s teeth continue to appear over time and that they are otherwise well. If you notice anything unusual about the appearance of the teeth themselves, such as discolouration or unusual shape, a paediatric dentist can offer reassurance or guidance.
