In most cases, one bar on the early pregnancy test means that you are not pregnant, but the early pregnancy test may also give false positive or false negative results, so it is best to go to the hospital to test the human chorionic gonadotropin in the blood to determine if you are pregnant. If there are two bars on the pregnancy test, one dark and one light, there is a high chance of pregnancy and you can test again after a week. If the test still shows one dark and one light bar after one week, you need to go to the hospital for further tests. If there are two dark bars, it means you are pregnant, and one bar means you are not pregnant. The most accurate way to detect pregnancy is to go to the hospital to have a blood test for HCG and an ultrasound to determine the exact location of the pregnancy, such as whether it is intrauterine or extrauterine.