A 15-year-old female with known von Willebrand disease type…

A 15-yeаr-оld femаle with knоwn vоn Willebrаnd disease type 1 presents for routine follow-up. She reports heavy menstrual bleeding lasting 8-9 days each cycle, requiring pad changes every 2 hours on her heaviest days. She has mild iron deficiency anemia (hemoglobin 10.8 g/dL, ferritin 8 ng/mL). She is not sexually active. Her mother asks what the best long-term management option is. Which of the following is the most appropriate recommendation?