Puberty is delayed when there is no sign of pubertal development in boys by 14 years and in girls by 13 years. The first sign of puberty in girls is breast enlargement. It is mostly visible and sometimes mildly painful. In boys, the first sign of puberty is enlargement of the testes. This is usually not noticeable. However, most boys are brought to the endocrinologists only when parents fail to notice pubic hair growth.
But pubic hair growth can be present even in people with pubertal delay.