Hi there .... may I suggest that you post your question on the Expert Forum where all questions are answered by the Physicians employed by The Cleveland Clinic. You are correct; any introduction of Estrogen would increase your risk of recurrance since your tumor was ER+. I believe you might get a more satisfactory answer from the Dr.s on the other Forum. There are Dr.s who answer on the Community Forum but all are from outside the U.S. and just do it on a volunteer basis. Regards ..