The male and female reproductive systems are intricate, and unfortunately many things can go wrong within a lifetime. Although the word 'infertility' is commonly used, to be 'infertile' is actually rare and means a total absence of reproductive function. Most people seeking treatment have a varying degree of what is known as 'subfertility'. One or more parts of their reproductive systems are impaired in some way, and they may well need some medical help to conceive. In this booklet we use the word 'infertility' to include 'subfertility'.
Infertility equally affects both men and women.
For men it is most commonly due to poor sperm quality. For women it can be due to a number of factors. The first thing to determine, if possible, is the cause of your infertility. If this is investigated thoroughly you are more likely to recieve the most suitable treatment. Usually the cause of infertility will be investigated following a referral from your GP to an infertility clinic.