Babies have soft spots, also known as fontanelles, because they are spaces between the bones of the skull where bone formation isn't complete. This incomplete bone formation serves crucial purposes, primarily during birth and early development.
The Function of Soft Spots
These soft spots play a vital role for babies:
- Molding During Birth: The flexible nature of the skull due to these gaps allows the baby's head to mold and compress slightly as it passes through the birth canal. This reduces the likelihood of birth injuries.
- Brain Growth: The fontanelles provide space for the rapid brain growth that occurs during infancy. As the brain expands, these gaps allow the skull to adjust accordingly.
Types of Soft Spots
There are generally two noticeable soft spots:
| Feature | Location | Closure Time |
|---|---|---|
| Smaller Soft Spot | Back of the head | Typically by 2 to 3 months |
| Larger Soft Spot | Toward the front of the head | Often by around 18 months |
Understanding the Timing of Closure
- The smaller soft spot at the back of the head usually closes within the first few months (around 2 to 3 months).
- The larger soft spot toward the front of the head takes a bit longer to close, usually around 18 months.
What to Expect
- It is completely normal for these soft spots to be present.
- They are not delicate or easily injured; gentle handling is all that is needed.
- If you have concerns about the appearance or rate of closure of your baby’s soft spots, consult with a pediatrician.
In summary, babies have soft spots because these gaps in the skull allow for safe passage during birth and accommodate rapid brain growth in the first months of life. The soft spots are a normal and important part of infant development.
