How long does it take for ovarian cancer to progress? months or years?

It depends...: We need more details of your medical history. What stage of Cancer was it when your cancer was removed ?and give us the dates of surgery and if you have taken any chemotherapy. Once we know what has been done to you and to your cancer, then we can give you a more reliable answer. Ovarian cancer is curable in many folks but it can be dangerous for others. Good luck.

Hugely variable: A lot depends on the type. A common granulosa cell tumor may smolder for decades before spreading. Choriocarcinoma has always spread by the time it is discovered, but all other tumors are unpredictable. If there is the least suspicion of cancer, staging is in order and most often excision.