- Biochemical recurrence is defined as a CA-125 greater than or equal to two times the upper normal limit; patients whose CA-125 is less than 100 U/mL must undergo a second confirmatory value within a period of not more than 4 weeks; patients with a level greater than or equal to 100 U/mL may be entered without confirmatory measurement; the CA-125 assessment for eligibility must be done at least 4 weeks after paracentesis or other surgical procedures