Teething progresses through distinct stages as your baby’s teeth emerge over time. In the early months (0–3 months), babies begin exploring their mouths, though no teeth have appeared yet. The first teeth, which are usually the lower front teeth (central incisors), tend to appear when the baby is between 4 and 7 months old. From 8 to 16 months, several more teeth emerge, including the upper incisors and molars, which can cause increased discomfort. Finally, between 20 and 30 months, the second molars appear, completing the full set of 20 primary teeth. Each stage brings unique challenges, but knowing what to expect can help you prepare for and manage your baby’s needs.