Can Pregnancy Tests Show Positive Results After Expiration?

Learn how evaporation lines on pregnancy tests can lead to false positives and how to interpret test results accurately.

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Yes, pregnancy tests can turn positive after too long. This is called an evaporation line, where the urine has evaporated, leaving a faint line that can be mistaken for a positive result. To avoid misinterpretation, read the test within the time frame recommended in the instructions.

FAQs & Answers

  1. How long should I wait to read a pregnancy test? You should read a pregnancy test within the time frame stated in the instructions, usually 3-5 minutes.
  2. What is an evaporation line on a pregnancy test? An evaporation line is a faint line that appears after the test has dried, which can be confused with a positive result if not read on time.
  3. Can I get a false negative pregnancy test? Yes, false negatives can occur, especially if the test is taken too early or not followed as per instructions.

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