What Causes Delayed Puberty in Boys?

There are 2 types of delayed puberty, which are:

  • Primary hypogonadism
    This is when the testes do not respond to the hormones (FSH and LH) made by the pituitary gland.
  • Secondary hypogonadism
    This is when the pituitary gland does not produce the hormones FSH and LH. This type of delayed puberty might happen very late, but is otherwise normal. It also tends to run in families.