Infant growth and development standards can be analyzed in terms of height, weight, intelligence, language and physical fitness as follows: 1. Height: when babies are one month old, their height grows fast on the table, and may grow about 4 centimeters to 6 centimeters. 2. Weight: infants born at the time of weight in 2.98 kg to 6.33 kg or so, the first three months of weight growth rate is relatively fast, may be in the roughly will grow 3 pounds to 6 pounds or so, the later with the age of the month, each month the height growth rate will slow down, roughly 2 pounds to 3 pounds or so. 3. Intelligence: When babies are around three months old, if parents tease their babies, the babies will also smile at their parents. 4. Language: Babbling sounds may be produced at around five months of age. 5. Physical: Infants may roll over at three months, sit on their own at six months, and crawl on their own at nine months. Because of individual differences, there is no fixed definition of growth and development standards for infants, and parents need to be more accompanied.