Nine months baby height and weight of men and women are different, such as male babies standard height is around 72.6cm; weight is around 9.33kg. The standard height of female babies is about 71cm and their weight is about 8.69kg. But there are individual differences. Normally, the height of a nine-month-old baby boy ranges from 65.2cm to 80.5cm, with an average height of around 72.6cm. The weight ranges from 6.67kg to 12.99kg and the average weight is also around 9.33kg. The average height of a baby girl is between 63.7cm and 78.9cm, with an average height of 71cm, and her weight is between 6.34kg and 12.18kg, with an average weight of 8.69kg. Height and weight are affected by genetics, nutrition and other factors, individual differences are large, standard values can be used as a reference, but not absolute. If your nine-month-old baby’s height and weight deviate significantly from the standard, you need to be vigilant and seek medical advice from a pediatrician to assess growth and development and take targeted measures to improve the situation.