Changing how? I've been on progesterone shots since May 20th and I haven't had any side effects other than being super tired.
Your progesterone naturally peaks after you O and I don't think our voices change as a result. It's probably something else. I had no side effects from progesterone shots other than a sore behind :)
Good luck! Keeping my fingers crossed for you this cycle!
I googled it and it seems BC pills with progesterone can alter your voice????
Guess what ladies. On Prometrium again for the first time since June 2010 and voice is changing again! I sound like I am a night time radio DJ. Same as last time. Weird.