Obscure virus found in women with unexplained infertility
The little-known member of the human herpesvirus family called HHV-6A infects the lining of the uterus in 43 percent of women with unexplained infertility but cannot be found in that of fertile women, researchers have discovered. The study also reported that the infection is exacerbated by hormone estradiol. Estradiol fluctuates with the menstrual cycle. High levels may trigger an active infection localized in the uterus.