It has been announced a new study has shown that male circumcision reduces cervical cancer risks for their partners:

Circumcising men can reduce cervical cancer risk in women, a new study shows.

The study involved more than 1,200 HIV-negative, heterosexual couples living in Uganda, where circumcision of male adults is increasingly encouraged as a means of slowing the spread of HIV/AIDS.

Half the men received the surgical procedure at enrollment and the other half were scheduled for circumcision after their participation in the trial ended.

Two years later, the female partners of the men who remained uncircumcised were more likely than the partners of the circumcised men to be infected with human papilloma virus (HPV) types most often associated with cervical cancer.

When I was about 6 years old, I remember discussing the correlation between uncircumcised partners and cervical cancer, though that was prior to the understanding of the correlation between HPV and cervical cancer.

This has been known for something like 100 years.