This product is used for quantitative detection of human epididymal protein 4 (HE4) in human serum in vitro. HE4 antigen is a glycoprotein with a molecular weight of about 20-25kd. HE4 antigen is a tumor marker of ovarian cancer. In ovarian cancer cases, HE4 is regarded as one of the early warning factors. It can indicate the risk degree of cancer, and it is a very good auxiliary index of surgical prognosis.