I have taken provera before...I am 25 years old and I have taken it three times and it was due to no ovulation for a period of 2 years...I had a very normal 5 day period(not heavy or light)it was pretty moderate...well that was what happened a couple of months ago when I took it...the time before I took it and found out that it increases your chances of getting pregnant and of course I got pregnant with my son who is now 5...My menstral cycle was normal for a couple of years after his birth(well as normal as I ever had..Once every 2 months and lasting about 3-4 days very light) SO I defiantly recommend using protection when you take it because I was told I would most likely never have kids and look at me now with a beautiful 5 year old son...Well as far as the medicine provera goes its good to take...It can jump start you period once you take it...but I have to say the last time I took it...I had my period that month and haven't seen any sign of it since...Well good luck