I know there is a connection. I took 1 injection, a few weeks later developed blurred vision and other other signs of diabetes. I am a registered nurse and I was not thinking diabetes but my opthamologist said my prescription had doubled and get checked. I did. Suddenly a diabetic after depo-provera. I wrote the company-pharmaceutical company-Upjohn and they have documented cases of this but not enough complaints because I feel some people are not making the connection. In my letter from upjohn, some reversed after coming off the medication. I did, but I did not reverse, that was 1995. So sad. More research needs to be done. Contact the companyn and the FDA and make a complaint. We need to prove this. There is a link.