An evaporation line does not indicate that a woman is pregnant. These lines often occur when a person has checked the result too late or taken the test incorrectly. When an evaporation line appears, it is best to take another test for an accurate result. A defective pregnancy test will not be able to detect pregnancy hormone in your urine. If you see the control line, then you know that the test is working. Expired pregnancy tests also have lost the ability to detect pregnancy because pregnancy tests have a maximum allowed life.
Why would a positive pregnancy test fade?
Some women see a clearly distinguishable positive line after taking a home test. But in other cases, the positive line appears faded. In these instances, a faint positive can be caused by low levels of the pregnancy hormone human chorionic gonadotropin (hCG).
Why did my pregnancy test results disappear?
You may not be pregnant (negative), or the level of pregnancy hormone may not yet be high enough to be detected, or you may have miscalculated the day your period was due. If you tested early, test again when you expect your period.
Why did my pregnancy test go from positive to negative?
The hook effect happens when you have too much hCG in your blood or urine. How is this possible? Well, the high levels of hCG overwhelm the pregnancy test and it doesn’t bond with them correctly or at all. Rather than two lines saying positive, you get one line that incorrectly says negative.
Why is my a positive pregnancy test coming back negative?
A positive then the negative test can also be because you repeated the test immediately and your urine sample (the second time around) had had a low concentration of hCG. As you know with not enough hCG to detect, the test will be negative.
Why do pregnancy lines disappear on a pregnancy test?
A pregnancy test can detect the hCG hormone — and if two lines appear, voila, you’re preggo. Reason #1 For Vanishing Lines: You’re Testing Too Early At least, that’s how it’s supposed to happen. But sometimes, a pregnancy line disappears, and it could happen for a variety of reasons, Dr. Kameelah Phillips, MD, an ob/gyn tells Romper.
Why did my pregnancy test result change so quickly?
Another reason why your pregnancy test result changes seemingly overnight might have nothing to do with you, but rather the age of your exam.
What happens if you take a defective pregnancy test?
A defective pregnancy test will not be able to detect pregnancy hormone in your urine. If you see the control line, then you know that the test is working. Expired pregnancy tests also have lost the ability to detect pregnancy because pregnancy tests have a maximum allowed life.