My son is 15 years old now, but he is still a bit over 1.4 meters tall, even shorter than some girls. I feel like he’s not young anymore. What are the stages of boys’ development? Based on your description, the child’s height growth is related to family heredity. The first growth spurt in boys usually occurs around 12 years old, and the second growth spurt around 16 years old. It is recommended to pay attention to strengthening nutrition, ensuring adequate rest, and actively engaging in physical exercise to promote growth and development. Generally, boys’ development is about one to two years later than girls’. Wishing him good health.