A 42-year-old nulliparous woman presents with a 2-year history of progressive menorrhagia, pelvic pain, and infertility. On examination, the uterus is enlarged to 14 weeks' size, firm, and irregular. Transvaginal ultrasound reveals a 6 cm submucosal fibroid (Type 2, 50% intracavitary) and two 3 cm intramural fibroids. She has been counselled about all management options. She desires to preserve fertility and conceive. What is the most appropriate management?