My Baby is 5 months but her weight is just 5.2 kg. she is very active and has no issues but still her weight gain is very slow. what can I do. she is on complete breast feeding

A. hello baby gaining a minimum of 600 grams to 800 grams per month then it is a good weight gain if not then check if the bm is sufficient by express your milk using Babyhug breastpump which can help of not give Nan Pro stage 1 or similac stage 1 using a bpa free bottle