what is the name of the hormone that pregnancy tests detect to indicate pregnancy?
All pregnancy tests work by detecting the presence of human chorionic gonadotropoin (hCG), the pregnancy hormone. In both urine and blood pregnancy tests, the presence of the hormone human chorionic gonadotropoin (hCG) is evaluated. The hCG hormone is usually only present in blood or urine if a woman is pregnant. When an egg fertilized with sperm is implanted in the uterus of the woman the hCG is then produced.