Ideal weight gain is twice of birth weight at five months,thrice at one of age and four times at 2 years. Barring chronic illness,weight gain depends on oral intake. Give just 2 top milk feeds using a glass,stop breastfeeding,give 4 solid meals a day including curd and Banana in the diet in addition to whatever you prepare at home. If weight gain is good,height will automatically follow,but as it depends on a lot of factors,don't fret about it.

She requires a proper growth and physical examination and a good nutitional history and counselling .so you must seek a pediatrician's help by personally visiting