A client takes a home pregnancy test. While she is waiting to read the results, her phone rings. When she gets off the phone 15 minutes have passed. The package instructions are to read the pregnancy test result at 3 minutes and warn that waiting longer may result in a false positive. What is a false positive?

Question

Caleb Phillips

Biology

29 December, 19:28

A client takes a home pregnancy test. While she is waiting to read the results, her phone rings. When she gets off the phone 15 minutes have passed. The package instructions are to read the pregnancy test result at 3 minutes and warn that waiting longer may result in a false positive. What is a false positive?

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Answers (2)

Know the Answer?

Hallie Crosby · Answer 1

False positive

Explanation:

False positive results may occur if the test strip stays too long in the urine and this happens as a result of the evaporation of the urine.

Anton Wilkerson · Answer 2

Yes a false positive result will be read

Explanation:

Instructions on most pregnancy tests will tell you to read the results in a certain amount of time, usually from a couple of minutes. So you may take a pregnancy test and read it within the above time period as negative.

If you happen to keep the test around to look at later, you may notice that after that allotted time, the test now appears to have a positive result. This is called an evaporation line. It is not indicative of a positive pregnancy test.

What is Evaporation Lines?

Evaporation lines happen when the urine that was on the test area starts to dry out and evaporate. The chemical composition of that particular urine sample has now changed since that urine sample evaporated, sometimes causing the test to show a positive line