It is generally normal for boys to show no signs of development at 12 years of age.
Generally speaking, boys 10 to 13 years old for the beginning of the developmental period, but this time is not fixed, because the developmental age of boys there are great individual differences, and genetic, environmental, disease and so on are related.
Everyone develops at different times, so it’s normal for a 12-year-old boy to show no signs of development. If you are worried, you can go to the hospital for an interview to check his endocrine status.
Usually, we should pay attention to the adolescent children to strengthen the nutritional intake, but also should avoid the child to develop the habit of picky eating, partiality, but also pay attention to strengthen physical exercise, promote the development of boys, improve immunity, reduce the probability of disease, to prevent the normal development of boys affected.
Although there is individuality in development, if parents find that boys have the tendency of precocious puberty or precocious puberty, it is recommended that they should consult a doctor in time to investigate the cause of the disease and intervene, and cooperate with the doctor to actively treat the disease.