A 28-year-old woman presents with a 1.5 cm firm, mobile mass in the left breast that has been present for 18 months with no change in size. She is planning pregnancy in the next 6 months and is concerned about the mass. On clinical examination, the lesion is well-circumscribed and non-tender. Ultrasound confirms a BI-RADS 2 lesion consistent with fibroadenoma. She requests excision because she is worried it may interfere with breastfeeding or become problematic during pregnancy. What is the most appropriate counseling?