This study examined a rare fungal infection of the uterus called fungal endometritis that causes abnormal bleeding and discomfort in women. Researchers found that about 12% of women with unexplained abnormal bleeding had this fungal infection, which was caused by different species of Candida yeast. A simple test using vaginal swabs was not effective for diagnosis; instead, doctors needed to take samples directly from the uterine lining. Treatment with an antifungal medication called voriconazole combined with surgical cleaning was successful in all cases studied.