my baby weight at birth was 3.2 kg but now he is two months old and his weight is 3 kg is it ok?

A. If you look at it instead of gaining about thousand grams of weight in these 60 days your child has lost 200 g how can it be normal practically if you look at it your child is having a degraded weight which is extremely unhealthy your child should having a progressing weight which should be at least half a KG in a month on the minimum side this is really not working out