PiggyB,
dont worry, remember our gals both small size at birth, as long as every month they got gain weight then it's ok, can't compare with other big size baby..my gal also only 57cm and 5.6kg at 3 month..the PD said her weight is ok, never mention her height, I know she's short lah, but her dad is short so I dont expect she will be tall anyway..actually from photo yr gal's face quite round,no worry about the weight.