My daughter aged 15 weeks, weighs 3.1 kg (Birth weight was 1.35 kg as she was born prematurely @ 32 weeks). Now my question is, whether this weight gain rate is normal or there any improvement is needed. Some doctors says it is ok as she is premature baby but some says she is underweight. Hence we are in confusion. So kindly suggest us regarding this and recommend any supplementary milk formula needed for more and healthy weight for 4 months old baby. Thank you