Learn about the height development standards for a 3-month-old infant and grasp the normal growth reference values.

Advice on handling growth pains for children whose height falls within the normal range at seven years old

The weight estimation formula for infants aged 3 to 12 months is as follows: Weight of infants aged 3 to 12 months = (Age x 9) / 2, in kilograms. Height: Children grow approximately 25cm from birth to one year old, with the first three months gaining around 11-12cm, and the last nine months also growing around 11-12cm.