Pregnancy tests If you think you may be pregnant , taking a pregnancy test as soon as the first day of your missed period can help you get the care and support you need. A home pregnancy test can tell whether you are pregnant with almost 99% accuracy, depending on how you use it. If a pregnancy test says you are pregnant, you should see your doctor for another test to confirm the pregnancy and talk about next steps. How soon can I use a home pregnancy test? Some home pregnancy tests are more sensitive than others and can be taken before your missed period. But you may get more accurate results if you wait until after the first day of your missed period. This is because the amount of the pregnancy hormone, called human chorionic gonadotropin, or hCG, in your urine increases with time. The earlier you take the test, the harder it is for the test to detect the hCG. hCG is made when a fertilized egg implants in the uterus. This usually happens about 10 days after conception (when the m