When you take a pregnancy test, the control line shows that the test is working and the test line shows the results. if a second line (pink or blue) appears, even a faint one, the test has detected the pregnancy hormone in the urine. check with your health care provider to confirm that you are pregnant.
Sometimes people mistake other lines on pregnancy tests for a positive result. the important thing to look for is a second line that develops color. a dark, bright, colorless mark on a pregnancy test is not positive. If you are ever unsure of your pregnancy test result, repeat with another test or consult your doctor.
how does a pregnancy test work?
For a quick introduction, home pregnancy tests check your urine for the hormone human chorionic gonadotropin, or hcg, which rises rapidly in your body after fertilization. lines on a pregnancy test turn colored if hcg is detected.
a first response™ home pregnancy test works like this:
- Special reagents are deposited in 2 locations on a pregnancy test strip, forming the “control line” and the “test line”.
- These test reagents may appear as whitish or slightly gray lines on the test strip, before or after use. In a First Response™ Pregnancy Test, these reagents are gold nanoparticles, which appear pink. they are responsible for turning the lines pink once the test is used.
- if hcg is not detected in your urine, only the control line will appear pink. If hcg is present in the urine, both the test line and the control line will appear pink. two pink lines indicate a positive result, even if one line is dimmer than the other.
- wait a couple of days and test again if you haven’t had your period yet.
- do the test first thing in the morning or after holding your urine for several hours.
- open the test envelope and use it right away (always check it is not expired first).
- have a first response pregnancy test handy for when you expect your period. You can use the First Response Early Result Pregnancy Test or the Digital Pregnancy Test as early as 6 days before your expected period or the Rapid Result Pregnancy Test on the day of your missed period.
- If you don’t want to worry about a line being a faint positive, use the digital pregnancy test to get a clear “yes+” or “no-” result or use the first response™ easyread app to scan your first response before result or rapid pregnancy test result and convert the results to the words “pregnant” or “not pregnant”.
Some tests, like the First Response™ Early Result Pregnancy Tests, are very sensitive and can detect lower levels of hCG so you can test as early as 6 days.*
what is a control line on a pregnancy test?
the control line lets you know that the test is working properly. Each non-digital pregnancy test has two lines that are either parallel to each other or form a plus sign. the control line is not a positive result.
If a control line does not appear after exposing the test to urine, the test is not working properly. you should throw away the pregnancy test and use another one.
what is the test line on a pregnancy test?
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The test line is the line that appears on a home pregnancy test if hcg is detected in the urine. if this line does not change color (turns pink for first response™), then the test did not detect hcg and you are most likely not pregnant.
In many cases when using a first response™ test, the test line may be a lighter pink than the control line, which is sometimes quite dark. A test line may be pale pink if your urine is dilute or it is very early in your pregnancy. however, don’t worry. even a slightly pink test line indicates a positive result. Bottom line, if there’s color on the test line, it’s time to see your doctor to confirm a pregnancy.
I’m still not sure if it’s a slight positive
Follow these tips on what to do if you’re not sure about your pregnancy test result:
try a first responder pregnancy test
There are a variety of first responder pregnancy tests to choose from when you want to find out if you’re pregnant. The First Response™ Triple Check Pregnancy Test Kit includes three different types of pregnancy tests, all in one box. For added security, the First Response™ Comfort Check Pregnancy Test Pack comes with 3 First Response™ Early Result Tests and 5 First Response™ Pregnancy Test Strips, so you can test early and often.
When it comes to your pregnancy test results, you want to be sure. that’s why we created the easy-to-read first response™ app. Download the app to your phone and scan your First Response™ Early Result or Rapid Result Test results. the app will interpret the test lines for you and display the words “pregnant” or “not pregnant”.
With the easy-to-read app, you won’t be left wondering, “is this a slight positive?” scan your test results and get the peace of mind of certainty.
And, as always, visit your doctor to confirm if you suspect a pregnancy test may be positive.
* first response™ detects the pregnancy hormone 6 days before the day you missed your period (5 days before the day you expected your period). In laboratory tests, the First Response Early Result Pregnancy Test detected pregnancy hormone levels in 76% of pregnant women 5 days before their expected period. see package for details on early testing.