Infertility is when a couple cannot conceive despite having regular unprotected sex. Around one in six or seven couples may have difficulty conceiving. However, the number of couples who are actually infertile is low at around 5%. About 85% of couples will conceive naturally within one year and 95% within two years if they have regular unprotected sex. A couple will only be diagnosed as being infertile if they have not managed to have a baby after two years of trying. Women over the age of 35, and anyone who is already aware that they may have fertility problems, should seek medical advice sooner.
Infertility can be caused by many different factors. About one third of infertility is due to problems in the female, another third is due to male factors, and in 30%, a cause cannot be identified.