my 59 days(8 weeks) boy is weighing 4.6 kg he was 4.2kg during 6weeks. is his weight normal as only 400 gms he has gained and how much ideally he should be during 10weeks vaccination. Birth weight: 2.7 Discharge weight: 2.5

A. Ideal weight gain of a baby during first 3 months is between 150-200 grams per week. Your baby is gaining appropriate weight till now , considering the birth weight. By the time he turns 5 months old, he will double his birth weight.