The baby’s growth and development is more influenced by the weight at birth as well as nutrition and disease. 15 months of the baby’s growth and development of the standard, generally do not consider premature babies these factors, the boy’s general height between 71.2-88.9cm, the girl’s height should be between 70.2-87.4cm; weight boy in 7.68-14.88kg, the girl’s weight in 7.34-14.02Kg; head circumference boy generally in 43.2-51.1cm, the girl’s head circumference in 42.2-50.0cm. The head circumference is generally between 43.2-51.1cm for boys and 42.2-50.0cm for girls, who should be able to walk steadily, say 3-word phrases, imitate their parents in household chores, stack two blocks with fine hand movements, and experience the pleasure of playing with adults.