An 18-year-old sexually active college student presents with complaints of lower abdominal pain and irregular bleeding for five days. She has no fever. She uses oral contraceptives as method of bih control. Upon examination, the cervix is friable, there is cervical motion tenderness and adnexal tenderness. The pregnancy test is negative. She tells you that she had a similar episode two years ago. What is her risk of infeility following this second clinical episode of pelvic inflammatory disease?