A pregnancy test can be made to show two bars by using a pregnancy test on a pregnant woman’s morning urine and by using an intramuscular injection of chorionic gonadotropin. The pregnancy test is mainly used to detect the amount of human chorionic gonadotropin in the urine, and only the urine of a pregnant woman can make the pregnancy test turn into two bars. There are three situations in which a pregnancy test becomes red with two bars; 1. Urine during pregnancy: only the urine of a woman who is pregnant may show a certain amount of chorionic gonadotropin, which is detected by the pregnancy test stick with two bars. 2. Use of human chorionic gonadotropin: Injections of human chorionic gonadotropin in the near future can show two bars when detected by a urine pregnancy test stick, but if the test is repeated a few days later, the color gradually becomes lighter, or even turns into a single bar altogether. 3. False Positive: If you use an expired, damp or damaged pregnancy test stick, you may have a false positive reaction and need to re-test with a valid pregnancy test stick. If there are two bars on the pregnancy test, it is recommended to consult a doctor if the diagnosis is not clear.