#asktheexpert My son is almost 4 months old by 13 May 2021. He is fed completely on his mother's milk 100%. How long should breast milk be continued and do he need any supplementary food in any time while soon ? and secondly he was born in normal delivery with forceps , but most time he keeps had turned right and why is it ? and up till what age does a infants skull gets harden and in complete final shape ?