From which month teether can be given?

instead of giving a teether, i would suggest give chilled carrots sticks for the baby to chew on, as it is safe and nutritious too. once the baby starts the teething phase, which could be anywhere between the 3rd to the 8th month or even later, you can give the same. your baby will start chewing on the fingers as a sign of teething, and you can give the carrot sticks then.