My is 16 month old still she didn't get her first teeth why

A. Hello good evening !! Teething starts generally by 7-11 months but few take time. Here the baby is having late teething check the calcium levels might be due to deficiency happens few times. Include fresh fruits and vegetables,cerelac, milk and dairy products, nuts and seeds powder(almonds,seseme,makhana) ragi ,egg in regular meals helps in meeting calcium requirement.