The Injection

I heard about the side effects of the injection but I was young and my doctor recommended it, so I thought it must be safe - right?
Well I don`t know. I have recently been diagnosed with polycystic ovaries and don`t really know if it is due to the injection or not, but what makes it worse is that there is really no way of finding out. My point is even if there is a tiny chance the two may be linked women should not take it.