When it comes to gonorrhea in women, chlamydial infection, trichomoniasis, genital herpes, syphilis, and chancroid, the evidence is inconclusive.
From the evangelicaloutpost.com
In terms of evidence of benefit, male circumcision has been associated with a reduced risk of sexually transmitted infections, such as human papilloma virus, chancroid and syphilis.
From the sciencedaily.com
A 2006 meta-analysis of observational data from twenty-six studies found that circumcision was associated with lower rates of syphilis, chancroid and possibly genital herpes.