The Difference Between a Faint Positive Pregnancy Test and an Evaporation Line

What is an evaporation line on a pregnancy test?

What color are evaporation lines on pregnancy tests? What does an evaporation line look like?

How can I tell the difference between a positive result and an evaporation line?

  1. Is it a pink line? If the result shows a pink test line that looks similar to the pink control line, then it’s likely a positive result. A positive result will run from the top of the test window to the bottom with the same thickness as the control line (even if it’s more faint). Is it a greyish white squinter that doesn’t look like the control line? Then it’s probably an evaporation line.
  2. When did the line show up? If a pink line showed up quickly, then it is likely a positive, pregnant result. If the line only showed up much later (say ten minutes or more) than the control line, it may be an evaporation line.

How to prevent evaporation lines

  • Try peeing in a cup, and dipping the test in the cup (instead of peeing directly on the test). This prevents splashing of urine that can make a test invalid.
  • Try testing first thing in the morning (when your urine has a higher concentration of hCG).
  • Only use tests before the expiration date on the wrapper.
  • Don’t open the wrapper until you’re ready to start testing, and don’t use it if the wrapper is damaged or torn.
  • Store your pregnancy tests between 36–86°F (2–30°C).
  • Wait five minutes to look at your results — and make sure to read the results within 15 minutes.

What pregnancy tests are best for avoiding evaporation lines?

Takeaways

  • Evaporation lines do occasionally happen when the urine evaporates.
  • The best way to tell is by reading the results within the timeframe explained in the instructions.
  • A positive result will have a test line that runs from the top of the test window to the bottom with the same thickness and color as the control line.
  • An evaporation line will be a grayish white mark that appears after ten minutes.
  • The best way to know if you are pregnant is to test again tomorrow.

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Fertility and pregnancy products. Inspired by beauty and backed by science. By moms, for you. ✨ www.natalist.com

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Natalist

Natalist

Fertility and pregnancy products. Inspired by beauty and backed by science. By moms, for you. ✨ www.natalist.com

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