Pregnancy test evaporation line

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The last thing you need are unclear results. So what is an evaporation line on a pregnancy test? Dye-based home pregnancy tests work by detecting the pregnancy hormone human chorionic gonadotropin hCG in your urine, says Kelli Burroughs , MD, a gynecologist in Houston. The first line is a control line, which displays regardless of whether you have a positive or negative result. The second line is a test line, and only pops up if you have detectable levels of hCG in your urine.

Pregnancy test evaporation line

It can sometimes be hard to tell whether that subtle, extra line on a pregnancy test is a positive result. An evaporation line or evap line typically appears as a faded streak, while a faint positive pregnancy test result looks like a lighter blue or pink line, depending on the test dye color. Because interpreting your at-home pregnancy test can occasionally be tricky, this article covers evaporation lines and faint positives, tips to get accurate results, and what to do if you don't. At-home pregnancy tests check your urine for human chorionic gonadotropin HCG , a hormone released by your body when a fertilized egg implants in the lining of your uterus. If one line the control line, which confirms the test is working appears on a non-digital test, it most often means you are not pregnant. If your test shows both the control line and a line in the test result window, this typically indicates pregnancy. Pregnancy tests are most accurate when taken after you have missed a period. Some at-home early pregnancy tests can be used to detect a pregnancy up to 10 days before a missed period, but these results are less reliable. An evaporation line is a faint, colorless line that appears in the results window of an at-home pregnancy test. This happens if the urine being tested has dried beyond the reaction time of the test. Sometimes evaporation lines and faint positive pregnancy test lines can appear similar, especially if you don't know exactly what you're looking for. Because of this, you may mistakenly assume that you are pregnant when you are not. An evaporation line does not indicate pregnancy. The safest bet is to take another test and read it within the specified time frame for the most accurate reading.

If you receive a faint positive result, consider taking another test a few days later to confirm the result. A negative pregnancy test indicates that your hCG levels are not above the average threshold found in early pregnancy — meaning you are most likely not pregnant, pregnancy test evaporation line.

In some cases, what looks like a positive pregnancy test result may actually be an evaporation line, also called an evap line. Here's how to tell the difference. If you're hoping for a positive pregnancy test, you may find yourself squinting at the test stick, willing two solid lines to appear. And if you wait long enough, both lines may indeed show up— but that doesn't necessarily mean you're pregnant. In some cases, what looks like a positive result may actually be an evaporation line or evap line. So what is an evaporation line? It's a marking that may materialize on a home pregnancy test after the sample has dried up and evaporated, says Robert Setton, M.

We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Healthline only shows you brands and products that we stand behind. The second line may be an evaporation line. This line can appear in the results window of a pregnancy test as the urine dries. You can pick up a home pregnancy test at your local drugstore or online.

Pregnancy test evaporation line

It can sometimes be hard to tell whether that subtle, extra line on a pregnancy test is a positive result. An evaporation line or evap line typically appears as a faded streak, while a faint positive pregnancy test result looks like a lighter blue or pink line, depending on the test dye color. Because interpreting your at-home pregnancy test can occasionally be tricky, this article covers evaporation lines and faint positives, tips to get accurate results, and what to do if you don't. At-home pregnancy tests check your urine for human chorionic gonadotropin HCG , a hormone released by your body when a fertilized egg implants in the lining of your uterus. If one line the control line, which confirms the test is working appears on a non-digital test, it most often means you are not pregnant. If your test shows both the control line and a line in the test result window, this typically indicates pregnancy. Pregnancy tests are most accurate when taken after you have missed a period.

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If your test shows both the control line and a line in the test result window, this typically indicates pregnancy. An evaporation line does not indicate pregnancy. One of the best ways to avoid any confusion when using a home pregnancy test is to check your results within the reaction time. Was this page helpful? If you continue to see faint lines when you repeat a pregnancy test, visit your doctor for an hCG blood test. Some pregnancy tests are more sensitive than others, meaning they can detect lower levels of hCG. There's two possibilities: it could mean a positive test result or it could be an evaporation line. Sometimes false-negative results occur even though you are pregnant. Sensitivity of the test Some pregnancy tests are more sensitive than others, meaning they can detect lower levels of hCG. By Kathleen Felton.

The last thing you need are unclear results. So what is an evaporation line on a pregnancy test? Dye-based home pregnancy tests work by detecting the pregnancy hormone human chorionic gonadotropin hCG in your urine, says Kelli Burroughs , MD, a gynecologist in Houston.

Medically reviewed by Katie Mena, MD. Waiting for the results of a pregnancy test can be agonizing. Learn more about how hormonal birth control can affect breast size. It's helpful to take a closer look at the line's color. Geburtshilfe Frauenheilkd. Gnoth C, Johnson S. Food and Drug Administration. These choices will be signaled to our partners and will not affect browsing data. Show more. Most pregnancy tests show two lines: a control line and a test line.