For those who are getting fasle positive I thought this was interesting---came with my insturctions with opk i finally got.
A number of conditions other then pregnancy, including trophoblastic disease and certain non-trophoblastic neoplasms including testicular tumors, prostate cancer, BREAST CANCER, and LUNG CANCER cause elevated hcg. Therefore, the presence of hcg in urine should not be used to diagnose pregnancy unless these contions have been ruled out.