Age Increment Increment Weight(kg (kg (kg/y) At birth 3m 36 12m 9± 333 24m 12± 632 >2y pUberty 2kg /yIncrement (kg/y ) Increment （kg） Age Weight (kg) >2y ~Puberty 2kg /y 2 3m 6± 12m 9± 24m 12± At birth 3 3 3 6 3 3