Baby Growth Process Chart Introduction Baby growth is a process worthy of attention, which involves different aspects such as the baby\’s physical development, psychological characteristics, and cognitive abilities. In order to better track the growth of their baby, many parents will create a baby growth chart. This process is elaborated on in four aspects below. Physical Development During the first three months of life, a baby\’s body develops rapidly and his or her weight may more than double. At the same time, the head and limbs will gradually grow. Over the next three months, the rate of physical growth will slow down, but your baby\’s head will continue to grow.