I've been on hrt for a little over a year now, and I've maintained my functioning minus the ejaculation and random erections, which, I don't like anyway. At first, I lost function entirely, but after a few months my doctor added progesterone to the mix and that's when I regained my ability for erections. It takes a little longer to get one now, and will go away quicker if not maintaining stimulation, but I don't mind that. The size and girth of the erection is unchanged. I've concluded that the progesterone is what allows me to keep them, because if I stop taking it for a month, it will go away again. Hope this helps..