Remain calm: Depending on what test you're referring to, generally if the "control" box remains blank, the test result is not valid either because the test itself is bad or the specimen tested was in some way inadequate or done wrong. In this situation a new test kit should be used to repeat the test. You may be able to get a refund. Check the instructions for more specific info.
Answered 8/24/2020
2.4k views
HPT: Home pregnancy test? Don't panic. One of the boxes is a control. If there was no change then you may need to purchase another test. Don't panic.
Answered 8/24/2020
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