Beta-hCG

Beta-human chorionic gonadotropin (beta-hCG) is a hormone produced by the placenta after implantation of a fertilized egg into the uterine wall. It serves as a key marker for pregnancy. The hormone consists of an alpha and a beta subunit. While the alpha subunit is identical to those in other hormones like LH, FSH, and TSH, the beta subunit is unique to hCG, making it specific for pregnancy detection. Beta-hCG enters the bloodstream and urine, allowing for detection through blood or urine tests. Its concentration typically rises rapidly in early pregnancy, doubling approximately every 48 to 72 hours, which facilitates monitoring the early stages of gestation.