If GnRH is not released correctly by the hypothalamus, located deep within the brain the pituitary, located close by is not able to release the hormones LH and FSH.
No LH and FSH means that the testicles can not grow and produce testosterone and sperm.
No LH and FSH means that the ovaries can not produce oestrogen & progesterone or allow eggs to mature and be released.
So no GnRH means no reproductive hormones and infertility.
If GnRH production is affected early in life it means that puberty does not occur either.
