![]() If you were recently pregnant, you might still have leftover hCG in your system. To avoid that mix-up, wait at least two weeks after your last hCG injection to take a home pregnancy test, he says. That could trigger a positive pregnancy test, even if you’re not pregnant. If you’ve been taking fertility medications, that hCG might still be floating around your system. ![]() “A lot of fertility treatments involve taking hCG injections,” Dr. “But this is the most common reason that a pregnancy test might appear to have been false.” Fertility medications “It’s not technically false since a very early pregnancy did occur,” he says. In this case, the test was accurate - there was a pregnancy, but it wasn’t a viable one, Dr. What gives? The most common reason this happens is an early pregnancy loss, also known as a chemical pregnancy. (Positive!) But a few days later, your period arrived in force. You took a pregnancy test and got two lines. Some potential causes include: Early miscarriage or chemical pregnancy But what about a false positive?Īdvertising Policy Chances of a false positive pregnancy testįalse positives aren’t super common, Dr. In other words, timing can lead to a false negative. If you take the test too soon after conceiving, it might say you’re not pregnant when you really are. If hCG is present, you should get a positive test result when you pee on a stick.īut hCG levels start out very low and increase over time. Home pregnancy tests look for that hormone in your urine. ![]() When you get pregnant, your body produces a hormone called human chorionic gonadotropin, or hCG. Emery explains when and why a pregnancy test might give a false positive - and what you can do to make sure the stick doesn’t lie. “But there are some reasons you might get a false-positive result.”ĭr. “Home urine pregnancy tests are pretty reliable,” says Ob/Gyn Jonathan Emery, MD. But what are the odds a positive pregnancy test might be wrong? PolicyĮither way, if you think you might be pregnant, you need to know for sure. We do not endorse non-Cleveland Clinic products or services. Advertising on our site helps support our mission. Cleveland Clinic is a non-profit academic medical center. ![]()
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