my 3 month baby not weight gain can I give anyother supplements??

A. Hai good evening !! Until 5 complete months exclusive breast milk or formula milk is suggested from 6 month onwards start semi solid foods, fluids. Check if baby increasing weight and is in ideal range of weight according to age. The ideal weight of 3 months old should be 4-7.5kg By 5- 6 months babies double their birth weight.