There are gender-specific and individual differences in meeting the height and weight standards for five-month-old babies. Generally speaking, the height of a five-month-old male baby is 59.9 to 73.9cm and his weight is 5.66 to 11.15kg; the height of a five-month-old female baby is 58.6 to 72.1cm and her weight is 5.33 to 10.38kg. If the baby’s height and weight are within the standard range, it suggests normal growth and development. If they are below the standard range, it suggests that the baby may have growth retardation. In addition, baby’s height and weight are also affected by genetics, diseases and other factors, such as small height and weight at birth, may also be small at five months; disease states, such as recurrent respiratory infections, hypothyroidism, can also lead to baby’s growth and development is limited. Parents need to pay attention to whether the amount of milk is sufficient and add formula milk if necessary. In conclusion, if your baby’s height and weight are not up to standard, it is recommended that you consult your pediatrician in a timely manner.