my baby is 18 months old and her weight is 8.4 kgs which is constant since 4 months and she is very active may I know how to gain her weight

A. Hello! Average weight of girls, typically in this age is around 9 to 11 kgs. Your child is on the lower side of weight gain. It is important to rule out underlying issues like absorption, anaemia, or calorie deficit in your child by consulting the doctor.