Overview of the growth and development of three-month-old babies. When babies are three months old, they have begun to possess many basic physical abilities, such as raising their heads and turning over. In view of the baby\’s growth and development during this period, we elaborate on the four aspects of weight, height, athletic ability and social ability. In terms of weight, a three-month-old baby will generally gain 1.2-1.5 kilograms, an increase of about 30%. At the same time, the baby\’s length will also increase by about 2.5-4 cm, which is a relatively rapid growth and development period. But need to pay attention to