There is a rapid rate of growth during infancy.
Parents often tend to worry about their baby's growth.
Here are some rough guidelines to steer you through the maze. Your newborn will lose some weight during the first few days of her life, but then will start gaining steadily. After the first month, weight gain may average 1.5 to 2 pounds and length may increase 1 to 1.5 inches per month to 3 months. Premature babies may be more closely monitored to make sure they are growing properly. Between 4 and 7 months, the average rate of growth for a baby is about 1 to 1.25 pounds a month.