my baby is 2 and half month old his weight is 4kg600gm this is ok weight ? I m tense for his weight. he drink only formula milk

A. this is okay...as babies gain around 500 to 800 g per mnth... should double the birth wt 4 to 6 mnths and three times the birth at completing one yr... it is exclusively breast feed recommended fr 6 mnths... regular pumping increase milk use Babyhug electric breast pump...