hello ,good evening mam or sir ,my son weight 9 months 6days boy ,he is 8.3kg is that weight is correct ,plz give me how to gain weight of my baby boy

A. depending on birth chart it will differ slightly. Month one 3.2-5.4 Month two 4-6.5 Month three 4.6-7.4 Month four 5.1-8.1 Month five 5.5-8.7 Month six 5.8-9.2 Month seven 6.1-9.6 Month eight 6.3-10 Month nine 6.6-10.4 Month 10 6.8-10.7 Month 11 7-11 Month 12 7.3-12 make sure to give healthy diet.