The study was done from 1997 to 2003 to create new growth curves for assessing the growth and development of infants and young children around the world. While the natural feeding choice is breastfeeding, older baby height and weight chart s were developed following formula fed babies. Weight for Age Girls 0-6 months . Birth to 2 years . 6 months to 2 years . 2-5 years . Birth to 5 years . Boys 0-6 months . Birth to 2 years . 6 months to 2 years . 2-5 years . Birth to 5 years . Weight for Length Girls Birth to 2 years Boys. Birth to 2 years . Weight for Height Girls 2 to 5 years. Boys. 2 to 5 years . BMI for Age Girls