Most babies get their first tooth around 6 months of age, though the normal range spans 3 to 12 months, with some not showing teeth until after their first birthday. At birth, your baby already has all 20 primary teeth—they're just hidden in the jawbone, gradually erupting through the gums over the first two and a half years.
The timing is highly individual and predictable only by one factor: your own baby's genetics and family history. Your pediatrician is the right person to call if teeth haven't started appearing by 18 months, but wide variation is normal within that window. This article explains what to expect, what order the teeth come in, why some babies get teeth early or late, and how to care for them once they arrive.
Table of Contents
- What Is the Normal Timeline for a Baby's First Tooth?
- Which Tooth Comes First, and in What Order?
- Is Genetics Really That Predictive?
- What Happens Inside the Jaw Before Teeth Erupt?
- When Should I Call the Pediatrician About Teething Delays?
- How to Care for Your Baby's First Teeth
- Understanding Teething Discomfort and Symptoms
- Differences Between Babies: Why Timelines Vary So Much
- The Complete Eruption Sequence and When All 20 Teeth Arrive
- Preparing for the Years Ahead and Permanent Teeth Later
- Frequently Asked Questions
What Is the Normal Timeline for a Baby's First Tooth?
The average age for a first tooth is around 6 months, but "average" is misleading because the range is so wide. A baby who cuts a tooth at 3 months is not ahead of schedule; neither is one who waits until 12 months. Both fall comfortably within normal development.
The wide range reflects genetic variation more than anything else. Some families naturally teethe early. Others, just as healthy, have no visible teeth until closer to their first birthday. Neither timing predicts anything about how many teeth the baby will eventually have or how they will be spaced. Fully erupted and well-aligned teeth at age seven have nothing to do with whether the first one appeared at 4 months or 14 months.
Most babies will have cut at least one tooth by 12 months. By approximately 33 months (just before their third birthday), most babies have all 20 primary teeth. This is a broad timeline, though, and some children finish erupting their full set a month or two earlier or later—still completely normal.
What matters more than age is consistency. If your baby was cutting teeth on a typical schedule and then stops for several months, mention it to your pediatrician. If teething seems painless and your baby is eating and sleeping normally, there's nothing to worry about, even if teeth are taking their time to arrive. The difference between "late" and "normal" is 18 months.
If your baby hasn't begun developing teeth by 18 months, it's recommended to consult a pediatric dentist or pediatrician, though some variation beyond this age may still be normal. Before that age, simply watching and waiting is the right choice.
Which Tooth Comes First, and in What Order?
The two bottom front teeth—the lower central incisors—are almost always the first teeth to erupt, typically appearing between 6 and 10 months. These teeth usually arrive one at a time, sometimes weeks or even months apart, and one side often comes in before the other. After the lower central incisors, the upper central incisors erupt next, followed by lateral incisors (the teeth on either side of the center), first molars, canines, and finally second molars.
This general order is consistent across most babies, though the exact timing can vary significantly from child to child. The complete eruption sequence lasts until the upper second molars appear, completing the set of 20 primary teeth by approximately 33 months. These back molars can be the trickiest—they often cause the most discomfort and take the longest to break through.
One consistent pattern: lower teeth generally appear before the corresponding upper teeth, and girls' teeth typically erupt earlier than boys' teeth. If your daughter's first tooth arrives earlier than your son's, this is simply a normal sex difference in development. It doesn't mean anything is different about their health or their permanent teeth later.
The specific timeline for the full eruption sequence runs from the first teeth around 6 to 10 months through the final molars at 23 to 33 months. Some babies speed through this while others spread it out over the full window. Both patterns are normal. The key is that all 20 teeth are in place by age three, not the age at which each individual tooth appears.
Is Genetics Really That Predictive?
Yes. Genetics is the single strongest predictor of teething timing—if one or both parents teethed early or late, their baby is likely to follow the same pattern. This is one of the few things about teething you can actually predict with confidence before your baby is born. If you cut your first tooth at 4 months, your baby is more likely to follow that pattern.
If you didn't get your first tooth until 11 months, your baby probably won't either. Ask your parents or your partner's parents when you and your partner teethed—that's your best window for what to expect. Genetics doesn't determine the exact month or even the general range for every child in a family. Siblings can have different timelines even when parents' history is identical.
But the influence is real and measurable. twin studies show a significant hereditary component to teething age. Other factors matter too, but they matter far less than genetics. Nutrition, climate, season of birth, and most environmental factors have little to no effect on when teeth erupt. This is governed almost entirely by your baby's inherited developmental blueprint.
If your family history shows very early or very late teething, that knowledge helps you avoid unnecessary worry. If you got your teeth at 14 months and your baby hasn't cut one by 10 months, this likely means you're headed for a later eruption, not that something is wrong. Conversely, if everyone in your family teethed early and your baby is tracking that way, early teething isn't a medical concern—it's your family pattern.
What Happens Inside the Jaw Before Teeth Erupt?
Every baby is born with teeth already in formation—they're just not yet visible. At birth, the crowns of all 20 baby teeth are nearly completely formed but hidden in the infant's jawbones, gradually erupting through the gums during the first 2.5 years of life. This means your baby has been "teething" since birth in the literal sense—the teeth have been growing and moving toward the surface the entire time.
What changes around 6 months is not that teething starts, but that the first teeth are finally close enough to the surface to break through the gum. The process is gradual. Weeks or even months before a tooth becomes visible, the baby's body is resorbing the bone and gum tissue that sits above the tooth crown.
This movement puts pressure on the surrounding gum tissue and bone. That's where discomfort comes from—not the tooth cutting through, but the pressure and inflammation from the tissues making way. Some babies feel very little of this and seem surprised when a tooth suddenly appears. Others have months of low-level discomfort as the teeth slowly move toward eruption.
The baby who drools constantly, chews everything, and has swollen gums for weeks before a tooth appears is experiencing real inflammation, even though the tooth itself isn't through yet. Understanding this process helps explain why your baby might seem uncomfortable before you see any sign of a tooth. The tooth is already there, already moving, already creating pressure. It just looks like "nothing" because it's still hidden below the gum line.
When Should I Call the Pediatrician About Teething Delays?
The clearest guideline is simple: if a baby has not begun developing teeth by 18 months, it is recommended to consult a pediatric dentist or pediatrician. Before 18 months, patience is the right approach. Delayed teething in this window is common and usually resolves on its own. That said, you don't have to wait until 18 months if you're genuinely concerned.
If your baby is 12 months old with no signs of any teeth and no family history of late teething, a quick call to your pediatrician can be reassuring. They'll ask about your family history, check your baby's development in other areas, and likely tell you to come back if nothing has changed by 15 or 16 months.
Red flags that warrant a call before 18 months are not about teeth themselves but about other signs of developmental delay. If your baby isn't babbling, isn't sitting up, or shows other signs of slower development, mention the lack of teeth in context. Teeth delayed in isolation are almost never a sign of anything wrong.
Teeth delayed as one of several developmental delays deserve professional evaluation. A pediatric dentist, not a general dentist, is the right specialist if you end up needing a referral. Pediatric dentists specialize in children's oral development and can distinguish between normal variation and actual problems. Your pediatrician can refer you if needed. The worry itself is understandable, but statistically, a baby with no teeth at 12 or 14 months who is otherwise healthy and developing normally will cut teeth and catch up completely. There is no surgery, no treatment, and no intervention needed—just time.
How to Care for Your Baby's First Teeth
Once the first tooth appears, it needs care. Begin brushing your child's teeth with water as soon as the first tooth appears. Yes, with water only—no toothpaste yet. A soft infant toothbrush or a clean, damp cloth works equally well. Brushing at this stage isn't really about removing plaque; it's about establishing a habit.
One tooth is easy to keep clean by accident. The habit matters because by age two, your baby will have many teeth and will need real toothbrushing twice a day to prevent decay. Fluoride toothpaste is not recommended until your child can rinse and spit reliably, usually around age three. Until then, water is the right choice.
Swallowing small amounts of fluoride from toothpaste is not dangerous, but it's not necessary either, so water avoids any concern. The first tooth also marks the time for the first dental visit. Schedule the first dental visit after tooth eruption, no later than the first birthday. If your baby's first tooth arrives at 11 months, you have a short window before that deadline.
If teeth come earlier, schedule the appointment as soon as is practical—no need to rush. This first dental visit is not about cleaning or treating cavities. It's about establishing a relationship with a pediatric dentist, who will check that teeth are erupting normally and advise you on care as more teeth arrive. It's also a chance to ask questions specific to your baby's situation.
Between brushing with water and the regular dental visits, you've covered the essentials. Avoid bottles of juice or milk while sleeping, which can bathe developing teeth in sugar and cause decay. Water or breast milk only before bed is the simple rule.
Understanding Teething Discomfort and Symptoms
Not every baby experiences obvious teething symptoms. Some seem completely unaware that teeth are erupting. Others are clearly uncomfortable for weeks, with swollen gums, drooling, and a desire to chew on everything. Common teething symptoms include swollen or tender gums, excessive drooling, chewing on objects or fingers, and mild swelling of the cheeks or jaw.
A baby might run a very low fever—below 101°F—or have slightly looser stools. Some babies sleep less well or are fussier than usual. Importantly, high fever, diarrhea, or other significant symptoms are not caused by teething itself. If your baby has a fever of 102°F or higher, real diarrhea (more than a few loose stools), vomiting, or rash, these signal an infection or illness separate from teething.
Call your pediatrician rather than assuming teeth are the cause. The discomfort of teething is real but usually mild to moderate. Babies with significantly painful teething can be given infant pain reliever like acetaminophen or ibuprofen (if over 6 months old), following the dose for their weight. Ask your pediatrician for the right dose if you're uncertain.
Teething rings and cold (not frozen) objects help some babies by providing counter-pressure on the gums. A cold, damp washcloth is simple and effective. Avoid amber teething necklaces—they pose a choking risk and have no proven benefit. Similarly, teething tablets and gels have limited evidence of real benefit and aren't necessary. Most teething symptoms settle down once the tooth breaks through the gum.
The worst of the discomfort typically lasts days to a week per tooth, not months. If a tooth has been visible for two weeks and your baby is still extremely uncomfortable, mention it to your pediatrician to rule out infection or other issues.
Differences Between Babies: Why Timelines Vary So Much
The wide range in teething timing—3 to 12 months for the first tooth—reflects real biological variation, most of it genetic. But several other factors contribute to the spread, even if they don't change the overall pattern as much as genetics does. Girls' teeth typically erupt earlier than boys' teeth, so if you're comparing your daughter to your son, this difference alone accounts for several weeks.
It's not better or worse—just a normal sex difference in development, like growth rate or other developmental milestones. Birth order sometimes plays a role. Firstborn children don't systematically get teeth earlier or later than their siblings, but individual variation makes it easy to notice when an older sibling was early and a younger one is late.
Chalk it up to each child inheriting a slightly different mix of the family's genes. Premature babies should be evaluated using their corrected age for teething milestones until around age 2 or 3. A baby born at 8 weeks premature who cuts a first tooth at "14 months" is actually 12 months old in terms of development, right on schedule.
Nutrition is not a significant driver of teething timing. Babies fed breast milk, formula, or both teethe on similar timelines. There's no diet that speeds up teething or causes it to be delayed. The timing is set long before the baby is born. Illness, stress, or environmental factors occasionally seem to coincide with teething delays, but causation is hard to prove.
Most babies who have a serious illness still catch up on their dental milestones without intervention. The timeline might shift, but the overall pattern is preserved.
The Complete Eruption Sequence and When All 20 Teeth Arrive
Understanding the full timeline helps you anticipate what's coming next and know when each stage is normal. The lower central incisors appear first between 6 and 10 months, followed by the upper central incisors, then lateral incisors, first molars, canines, and finally second molars. Here's the approximate timeline: lower central incisors (6–10 months), upper central incisors (8–12 months), lower lateral incisors (9–13 months), upper lateral incisors (9–13 months), lower first molars (13–19 months), upper first molars (13–19 months), lower canines (16–23 months), upper canines (16–23 months), lower second molars (23–33 months), and upper second molars (23–33 months).
These ranges overlap significantly, and the order isn't rigid. Some babies cut their canines before their molars or vice versa. Some cut all four first molars in rapid succession; others space them out. All of this falls within normal variation. The most grueling period for many parents is from month 13 to 20, when the larger molars are arriving.
These teeth can cause more discomfort than the incisors, and multiple teeth may be erupting at once. Some babies sail through; others have weeks of night wakings and need extra comfort and pain relief. By 24 months (2 years old), most babies have 16 to 20 of their primary teeth. Those still getting teeth by 28 to 33 months are cutting the final molars.
Once those second molars are through, the baby has the full set of 20 primary teeth, which will stay in place until age 5 or 6 when they begin to shed to make room for permanent teeth. Keep in mind that these are population averages with wide ranges. Your baby's timeline might follow this sequence exactly or might deviate in order or timing. As long as all 20 are in by 33 months and there are no signs of decay or damage, the eruption pattern is fine.
Preparing for the Years Ahead and Permanent Teeth Later
The baby teeth your child has from age 2 to age 6 are temporary—they'll be shed and replaced—but that doesn't mean they're not important. Primary teeth guide the eruption and spacing of permanent teeth. Decay or premature loss of baby teeth can affect how the permanent teeth come in. Caring for baby teeth now means fewer problems later.
This is why brushing twice a day (with water first, then fluoride toothpaste once your child can rinse), avoiding sugary drinks and snacks, and regular dental visits matter. Cavities in primary teeth are reversible if caught early, but untreated decay weakens the baby tooth and can affect the permanent tooth underneath. Around age 5 or 6, the first permanent teeth begin to erupt.
This process—the shedding of baby teeth and eruption of the permanent set—lasts until around age 12 or 13. By that point, your child has 28 permanent teeth (the wisdom teeth come later, in late teens or early adulthood, if at all). The habits you establish now—brushing, flossing once teeth touch, limiting sugar, and regular dental visits—carry forward into childhood.
A toddler who's used to having teeth brushed and visiting the dentist will have an easier transition to brushing his own teeth and caring for his permanent teeth later. If you're unsure about any aspect of your baby's teething, your pediatrician or pediatric dentist is the right person to ask. The fear that something is wrong often exceeds the actual risk.
Most babies teethe without complications, get all 20 teeth by age three, and go on to have healthy permanent teeth. Normal variation is the rule, not the exception.
Frequently Asked Questions
What's the earliest a baby can get a tooth?
Some babies cut their first tooth as early as 3 months, which is still within the normal range. Very early teething doesn't affect health or signal a developmental advantage.
At what age should I be worried if my baby has no teeth?
18 months is the threshold for concern. Before that, wide variation is normal. If your baby has no teeth by 18 months, consult a pediatric dentist or pediatrician, though some children teethe later and catch up completely.
Do I need to use toothpaste when my baby's first tooth comes in?
No. Start with a soft toothbrush or damp cloth and water only. Fluoride toothpaste isn't recommended until your child can rinse and spit, usually around age 3.
When should my baby see a dentist for the first time?
Schedule the first dental visit after the first tooth erupts, no later than the first birthday. This visit establishes care and checks that teeth are erupting normally.
Can teething cause a high fever?
Teething can cause a very mild low-grade fever (below 101°F), but a fever of 102°F or higher suggests an infection or illness separate from teething. Contact your pediatrician.
Which tooth comes first?
The two bottom front teeth (lower central incisors) almost always come first, typically between 6 and 10 months, often one at a time weeks or months apart.
