You have a lot of options when it comes to choosing a home pregnancy test. All home pregnancy tests look for the presence of the hormone human chorionic gonadotropin (hCG) in your urine, but there are different styles available. Dye pregnancy tests are strips or wands that you either pee directly onto or dip into a container you’ve collected of your pee. If the test detects hCG in your urine, it’ll spark a chemical reaction that causes a positive test line to appear. Digital tests are simple to read—they will say “positive” or “negative,” or show a plus or minus sign. They’re user friendly and easy to interpret, but they may be less sensitive to hCG.