Published on December 7, 2015
A home pregnancy test detects the presence of the pregnancy hormone, human chorionic gonadotrophin (hCG), in your urine. Your body starts to produce hCG when a fertilized egg implants in your uterus (womb). HCG is secreted by the cells which will go on to form your baby's placenta. It can be detected in your urine from about six to 14 days after fertilization.