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       If you believe that you could be pregnant, a home pregnancy test can help you determine whether or not you may be pregnant. It is fairly simple to use a home pregnancy test, but it is essential that you thoroughly read the directions that come with the test. This is because the accuracy of the home pregnancy test results rests on how well you follow the directions and interpret the results. Everything you need to know about how they work, the earliest you can try them, and how to make sure you're doing it right. How do home pregnancy tests work? Home pregnancy tests measure the presence of a pregnancy hormone called human chorionic gonadotropin (hCG) in your urine. This hormone, produced by cells from the placenta, first enters your bloodstream after the fertilized egg (the embryo) implants in the lining of your uterus, shortly after fertilization. The amount of hCG in your body then increases rapidly over the next few weeks, often doubling ev...