Infertile men may be twice as likely to develop breast cancer, study suggests

The researchers looked at 1,998 men newly diagnosed with the disease in England and Wales over a 12-year period. Photograph: David Davies/PA Media

Infertile men may be twice as likely to develop breast cancer than those without fertility issues, according to one of the largest ever studies of the disease.

Breast cancer in males is less common than in females and its relation to infertility had previously been investigated only in small studies. The new research was published in the journal Breast Cancer Research.