(CNN) - There could be a new way to detect two dangerous forms of cancer before it's too late, and it's a test many women already take.
Researches say the Pap smear, used to detect cervical cancer, may also help find ovarian and uterine cancers.
Scientists at Johns Hopkins used cervical fluid collected during a Pap smear to do a genome sequencing test called the "PapGene."
Ovarian cancer is the deadliest form of cancer in women, in part, because it's so hard to detect.
Researchers say it's an exciting find, but more studies are needed.
You can find the study in the journal Science Translational Medicine.