Why do you treat your 7 year old daughter with drugs for prostate cancer?

I have had lots of strange questions in my life. This is one of the strangest....
-Why do you treat your 7 year old daughter with drugs for prostate cancer?
A pharmacist asked me when I was getting my daughters prescription. Indeed it is very strange.
Why do I do that?
Well, this is the drug to beat early puberty. My daughter had just turned 7 years old when we noticed that something was not right. She grew one centimetre per month and her behaviour was unstable among other things. The doctor took some books from her shelf to read and she sent us to x-ray my daughters hand. It turns out that her skeletal was 9 years old and not 7 years old. So, we had to start with injections every third week with very expensive hormones. The hormones for prostate cancer...anyway after beginning with the hormones I had a new daughter. Much calmer and happier again. Being in puberty is very unusual at 7 years of age. I wonder why it starts so early?
It is that strange thing again the statistics strike back again in my life....thankfully it wasn´t anything life threatening.