I was told that it most certainly would make me sterile. That being said, I wouldn't rely on it as a form of contraception if you're engaging in any potentially baby-making activities. I also was urged to bank sperm if I ever wanted to have biological children, and I went through that process before going to my first Endo appointment. I'd strongly suggest it, if you can. Thankfully, my health insurance covered the cost. I'd hate to get several years down the road, want to have biological children, and find out I couldn't.