Final answer:
Rapid growth occurs during infancy, which is faster than growth during puberty. Toddlers experience slower growth compared to infancy, while preschoolers continue to grow at a slower rate. The period of rapid growth is most significant during infancy.
Step-by-step explanation:
Rapid growth occurs during infancy, which is the period after birth. Growth during infancy is even faster than during puberty, when the adolescent growth spurt occurs. Toddlers experience a slower rate of growth compared to infancy, with about a 52 percent increase in weight from age one to three, and a 26 percent increase in height. Preschoolers continue to grow at a slower rate, gaining about 1.8 to 2.7 kg (4 to 6 lb.) per year and growing about 5.1 to 7.6 cm (2 to 3 in.) per year. The rapid growth period is most significant during infancy.