If you have taken a newborn baby to a hospital, you might have seen the doctor measuring the height of the baby using a chart with some complicated curves and diagrams. This is what a Fenton growth chart is. A Fenton chart helps the doctor measure the height and compare it against the age of the baby. This is a great tool to assess the infant’s health. Because growth rates in boys and girls are different, there are separate Fenton charts for boys and girls.