#asktheexpert Hi doctor, my baby boy is 1 year old now,and he is a premature babu born at 33 weeks,but his height is 68 cm and weight is 8kg is it normal I'm bit worried about his height.

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.