Email from haemophilia CNS which should be helpful
Obviously without knowing the details I couldn't be definite, but if hysterectomy is indicated then it can be done, but with appropriate treatment. They actually used to do hysterectomies for menorrhagia "willy nilly" without trying any other treatments first. Other treatments should be tried first if they haven't already done so,(through gynae referral to make sure nothing else is causing it), but she can ask her GP to refer her to her nearest Comprehensive Care Haemophilia Centre, or local Haemophilia Unit (unless that's where she currently is registered).
Hope this helps.