Yes, I have mentioned it and others have asked about it. It's a ring, like the ones that are used for birth control, that releases just 2 mg of estrogen over a 3 month period. Apparently it's just enough to thicken up the thinning parts, without putting you at risk for stuff, like the patch or pills do. Of course, if I had any risk factors for breast cancer, I might not have done it, but the thinning tissues were seriously interfering with riding and other, ah, activities. My doctor said that she has had patients who have been approved to use it after cancer surgery (by their oncologists), so for me, it was not a hard decision to make.