My mom is fighting ovarian cancer and her doctor does a CA-125 on her every month to see how well the chemo is working. For her the test has been very beneifical an dshe usually has the tests results back in just a couple of days. The doctor also does an MRI and CT scan to determine if the cancer is growing or spreading.
We have been dealing with this for about 1.5 years now and when they found mom's cancer they diagnosed her in Stage III level III which is pretty bad. Right now we are just dealing with it a month at a time which is how often she does chemo treatments.
If you have any other questions feel free to email me.