A 28-year-old sexually active woman presents to the clinic with frothy, greenish-yellow vaginal discharge with a foul odor, along with vulvar itching and burning. On pelvic examination, a friable cervix with a strawberry appearance is noted. A wet mount reveals motile trichomonads, and nucleic acid amplification testing (NAAT) confirms Trichomonas vaginalis infection. The patient declines treatment for the condition despite counseling. Which of the following complications is associated with untreated trichomoniasis in women?