No pregnancy hormone level present 1 red line in the control window (C) means that your pregnancy hormone levels are falling and the products of conception has been passed. The result is invalid (the test has not worked) if no red line appears in the control window (C), even if a line appears in the test window (T).17 may 2018
Can an invalid pregnancy test be positive?
Like most consumer goods, pregnancy tests expire and are sometimes used wrong. Using a test incorrectly or using an old one can lead to a false-positive result. Here are a few tips to avoid user error: * Before using your test, check the use-by date and follow the instructions closely.1 feb 2021
What does invalid means in pregnancy test strip?
INVALID RESULT If no lines appear anywhere on the test strip or if only the test line appears, the test has not worked properly and is invalid. This is usually due to the strip not being wet enough. Repeat the test with a new test strip ensuring that the strip is immersed in the urine sample for the full 10 seconds.