Users questions 

What does an evaporation line look like on a pregnancy test?

Joe Ford

What does an evaporation line look like on a pregnancy test?

A mark on a pregnancy test may be an evaporation line if: More than 10 minutes have passed since taking the test. The mark is faint and colorless, and it resembles a water spot. The mark has no visible dye in it.

Can a positive pregnancy test evaporation?

Evaporation lines are common and can occur with any pregnancy test. An evaporation line is a line that appears in the results window of a pregnancy test as the urine dries.

Do red dye pregnancy tests have EVAP lines?

Look at the line carefully — it may not be as bold as the control line, but as long as there is a distinct color to it, it’s considered positive. If it’s gray or colorless, it’s most likely an evaporation line. When in doubt, test again.

Do blue dye tests give false positives?

Absolutely. Blue dye tests are notorious for false positives. In other words, you may test and see a blue + symbol, but not actually be pregnant.

Can you see evaporation line immediately pregnancy test?

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.

When will a pregnancy test come up positive?

Around eight days after ovulation, trace levels of hCG can be detected from an early pregnancy. That means a woman could get positive results several days before she expects her period to start.

Does putting water on a pregnancy test make it negative?

Presumably, water will give a negative result (we hope!), but you still can’t then add your urine to the strip as well. If you reuse a strip that has gotten wet — either with water or urine and even if it’s dried — you may get a false positive. That’s because as an HPT dries, an evaporation line can appear.

What can throw off a pregnancy test?

7 Causes for a False-Positive Pregnancy Test

  • Chemical pregnancy.
  • Ectopic pregnancy.
  • Recent pregnancy loss.
  • User error.
  • Evaporation lines.
  • Medications.
  • Medical conditions.
  • Next steps.

Can I be 14 days late and not be pregnant?

If no sperm fertilizes the egg, a person’s period will usually start about 14 days later. While a missed period is one of the first signs of pregnancy, there are a variety of other reasons why it can occur. If a person does not menstruate for 3 months in a row, this is called amenorrhea.