Hiya Maggie................I'm another 56 yr old do it yourselfer, although I found a wonderful doctor and therapist that specialize in gid and cross gender hormone treatment, after I had transitioned. Like you, My education is in biology, and chemistry. One thing I would strongly suggest, is that you try to strongly discourage others from d.i.y. transitioning. It's too easy these days for anyone to get hormones and antiandrogens, and so many desperate people who would throw caution to the wind and possible make a lethal error.
So, welcome to susans!
Beverly,
gone 'legal'