my baby biy weight is 3.400 when birth and now he is 2 months 17 days old and his weight is 5.500 is he gaining proper weight or not and he is looking thin

A. Hi your child gainEd 2100 gm weight in gram weight in two months that’s approximately 2 KG 100 g so what else do you expect nor .: the child has gained 1 kg every month and that’s excellent so i don’t know how are you finding your child thin