Found on webMD:
"CA-125 blood testing can be used as a
marker of ovarian cancer, but it does not
always represent cancer when it is
abnormal. , First, many benign conditions
in women of childbearing age can cause the
CA-125 level to be elevated, so CA-125 is
not a specific test, especially in younger
women. Pelvic infections, uterine
fibroids, pregnancy, benign (hemorrhagic)
ovarian cysts, and liver disease are all
conditions that may elevate CA-125 in the
absence of ovarian cancer. Second, even if
the woman has an ovarian cancer, not all
ovarian cancers will cause the CA-125
level to be elevated. Furthermore, CA-125
levels can be abnormally high in women
with breast, lung, and pancreatic
cancer."
Didn't say anything about your period. I'd
just make sure to tell the doc about any
other things that might influence it
(anything stated above)