When do babies start getting teeth varies from baby to another depending on many factors. In general. Most babies start to get their first teeth when they're between 4 and 7 months of age. Some babies may get their first tooth as early as 3 months, while others may have to wait until they are a year old or more. That’s not all! Some babies may have their first tooth already at birth. If you suspect any thing wrong, do not hesitate to give your doctor a call.