Rating Newest Oldest. Best Answer: some babies tend to sleep more and better when they are teething, and some babies dont. it all depends on your baby. i know my son slept alot when his first two bottem teeth came in at 3 1/2 months...ating Newest Oldest. Best Answer: some babies tend to sleep more and better when they are teething, and some babies dont. it all depends on your baby. i know my son slept alot when his first two bottem teeth came in at 3 1/2 months...