It’s common for parents to wonder why their 8-month-old doesn’t have teeth yet. While the arrival of a baby’s first tooth is a notable developmental milestone, infant development is a highly individual process. Not every baby follows the exact same schedule, with significant variability among children.
Understanding Typical Teething Timelines
A baby’s first tooth typically emerges around 6 months of age. However, the normal range for this milestone is broad, often extending from 4 to 12 months or even later. Some infants may begin teething as early as 3 months, while others might not show teeth until after their first birthday.
Despite this wide timing variation, the general order in which teeth appear is more consistent. The lower central incisors, the two bottom front teeth, are usually the first to erupt. These are followed by the upper central incisors, and then the lateral incisors located on either side. Most children have their full set of 20 primary teeth by 2.5 to 3 years of age.
Common Reasons for Delayed Teething
A frequent reason for delayed tooth eruption is genetic predisposition. If parents or close family members experienced late teething, their baby may follow a similar pattern. This familial trait is a common and usually benign explanation for an 8-month-old’s lack of teeth.
Prematurity or low birth weight can also contribute to later teething. Babies born significantly early may experience developmental milestones, including tooth eruption, on a timeline relative to their corrected age. This delay is often temporary, with teeth eventually emerging.
Severe nutritional deficiencies, though uncommon in developed countries, can also impact tooth development. For instance, rickets, caused by a significant lack of vitamin D, calcium, or phosphate, can lead to delayed tooth eruption. Such deficiencies are typically accompanied by other noticeable symptoms related to growth and bone development. Certain systemic diseases or hormonal imbalances, such as hypothyroidism, can also affect the timing of tooth emergence.
When to Consult a Pediatrician
For most infants, having no teeth at 8 months is considered within the normal range of developmental variability and is not typically a cause for immediate concern. Late teething on its own usually does not indicate a serious underlying health issue. Pediatricians monitor developmental milestones during routine check-ups, where parents can discuss any questions or observations.
It is advisable to consult a pediatrician if delayed teething is accompanied by other concerning symptoms. These could include other developmental delays, such as issues with walking or talking, or signs of poor growth. Unusual facial features or other indicators of broader health concerns also warrant a medical evaluation. A pediatrician can assess the child’s overall health and development to determine if intervention is necessary.