A Beta HCG (BHCG or Blood Pregnancy Test) May Be Performed by Your Doctor If They Suspect That You May Be Pregnant, or if You Suspect. The human chorionic gonadotropin (hCG) blood test measures the level of hCG hormone present in a sample of your blood. Beta Human Chorionic Gonadotropin (Beta hCG) is a test which is used to measure the levels of beta hCG in the blood. -Monitoring therapeutic response in GTD or in hCG-secreting tumors. Where the Beta HCG Total blood test diagnoses pregnancy and helps in the examination of suspected ectopic pregnancy, Beta HCG Free is performed during the. Human chorionic gonadotropin (hCG) is a hormone produced by the placenta of a pregnant woman.