1. What are the two lines on the pregnancy test stick? 2. Does two lines on a pregnancy test stick mean you are pregnant? 3. What are the reasons for false positives on pregnancy tests? 4. How to use pregnancy test stick correctly? 1. What are the two lines on the pregnancy test stick? When a woman becomes pregnant, she produces a hormone called human chorionic villi (hCG). This hormone can be detected in urine, and most pregnancy tests detect pregnancy by detecting hCG in the urine. If the test result is two bars, it means urine