I'm not sure on my case. I was diaagnosed with prostate cancer Mar. 2007 had 4.2 psa and glleason score 3+4=7 had R.P. April 07 and my first psa after R.P. was .01 in July 2007 -- .05 in Oct. 2007 and 1.0 in Jan. 2008, would these numbers be concidered doubling and if so what's my next move, the Doctor say's to check it again in 3 months, Thanks Gary