When do baby get teeth is traditionally happens in a timeline vary from baby to another. However, 70% of babies get teeth according to this guideline: at 6 months: they get their lower central incisors, at 7 months: they get their upper central incisors, at 7.5 months: they get their lower lateral incisors, at 9 months: they get their upper lateral incisors, at12 months: they get their lower first molars, at 14 months: they get their upper first molars, at 16 months: they get their lower canines, at 18 months: they get their upper canines, at 20 months: they get their lower second molars, at 24 months: they get their upper second molars.