Andrological diseases

Congenital hypogonadotropic hypogonadism (CHH) is characterised by a deficiency of the gonadotropin releasing hormone (GnRH) in the brain. It is a genetic disorder which prevents spontaneaous puberty. Some men also have a problem with their sense of smell (Kallmann syndrome).

Development of abnormal breast tissue in boys and men. Excessive mammary gland development can lead to pain and aesthetic suffering in men.

A condition in which the testicles do not produce enough of the male hormone testosterone.

Inability to have sexual intercourse, as a result of absent erections, but also as a result of an erection that is not firm enough or not firm for long enough.

Congenital chromosome condition in which men have two or more X-chromosomes (e.g. XXY or XXXY instead of XY). Nearly all men with the Klinefelter syndrome are infertile.

In around half the cases where couples are unable to conceive, the problem lies with the man. A lot of factors can affect men's fertility. Often these are related to sperm disorders.