doc my daughter is 1 year old and she is just 8.4kg... is it ok ...she has secondary lactose intolerance and is on low lactose milk powder...

A. Expect your baby to double his or her birth weight by about age 5 months. From ages 6 to 12 months, a baby might grow 3/8 inch (about 1 centimeter) a month and gain 3 to 5 ounces (about 85 to 140 grams) a week. Expect your baby to triple his or her birth weight by about age 1 year.