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Male and female causes of infertility in the UK.1
| Cause | Frequency (%) |
|---|---|
| Female factors | |
| Ovulatory dysfunction (e.g. PCOS, hyperprolactinaemia, advanced age thyroid disease, primary ovarian insufficiency) | 25 |
| Tubal damage | 20 |
| Uterine or peritoneal disorders (e.g. endometriosis, fibroids) | 10 |
| Male factors | |
| Abnormal semen production or transport (e.g. genetic defects, surgery, infection, retrograde ejaculation) | 30 |
| Combined male and female factors | 40 |
| Unexplained fertility | 25 |
