Symptoms of trichomonal vulvovaginitis are relatively mild and treatment typically removes all symptoms. However, an infection of trichomonal vulvovaginitis can cause pregnancy complications, such as preterm delivery and low birth weight. Similarly, a pregnant mother may pass an infection of trichomonal vulvovaginitis to her fetus as it is being delivered. Studies show that women who have been diagnosed with trichomonal vulvovaginitis have a greater chance of contracting the HIV virus if they are exposed to it. This is because the inflammation of the vagina caused by the infection makes it more prone to other infections. Women who are HIV positive who are diagnosed with trichomonal vulvovaginitis are also more likely to pass the disease to their partner.