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Interpreting a pregnancy test result from an image: What does it mean if only the test line (HCG) is visible and the control line is absent?
Biology
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Answer
Based on the image, there is a clear pink line visible near the "HCG" label, which is the test line. However, there is no second line visible in the control region (usually further up the strip, near the "MAX" indicator).
For a pregnancy test to be valid, a control line must always appear. If only the test line appears and the control line is absent, the test is considered invalid. This means the result cannot be interpreted as either positive or negative.
Therefore, the test is:
- Invalid
You would need to re-test with a new strip to get a reliable result.
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