chapter  3
Diagnosis and causes of anovulation
Pages 14

Infertility is thought to affect about 15-16% of couples after 1 year of unprotected regular intercourse. After 2 years, with no treatment, about half of these couples will still not have conceived and after a further year, about 7% in all will remain infertile. Most couples will turn for help after 1 year, depending on their particular culture. That means that one in seven couples will look for advice after 1 year.