Sarah is 40 years old and presents with an 18 month history of dysmenorrhoea, deep dyspareunia and chronic pelvic pain. She has regular cycles around 30 days long and denies any intermenstrual or post coital bleeding. Her smear tests have always been normal in the past. She has been trying to conceive with her husband over the last year. Pelvic and abdominal examinations are unremarkable.
Based on the most likely diagnosis, which of the following factors in her history would not be classed as a risk factor?