Hi, I am currently about to have session 16 Avastin treatment following the usual carboplatin/ paclitaxol regime which included debulking surgery half way through. My CA125 has remained normal so presumably the Avastin is working so why will it be stopped after 18 treatments? Will this not just allow the tumours to start growing again? Some people seem to be on it longer and the cancer research website says people are on it as long as it is effective. This is really worrying me but my oncologist says I should be positive about completing the treatment!! I know I am stage 4 and not curable but i really want to try anything to prolong my life and stopping treatment seems so negative. Can anyone help to explain please?