Use of methenamine hippurate in male infertility.

In sperm-freezing for infertility patients with low sperm counts, we found that semen containing high numbers of white blood cells, greater than 15 to 20 per high-power field, was both poor in quality and difficult to freeze. In examining these patients carefully, we found that many had smoldering prostatitis and some an overt history of prostatitis. We treated them with methenamine hippurate using various methods and found that by decreasing the white blood cell count in their semen, we could frequently improve the semen quality, particularly sperm motility, also achieve pregnancies in some cases.