![Flaw in many home pregnancy tests can return false negative results – Washington University School of Medicine in St. Louis Flaw in many home pregnancy tests can return false negative results – Washington University School of Medicine in St. Louis](https://medicine.wustl.edu/wp-content/uploads/GettyImages-172961928_forweb.jpg)
Flaw in many home pregnancy tests can return false negative results – Washington University School of Medicine in St. Louis
![Caveat Emptor—Buyer Beware! Pregnancy Devices that Give False Negative Results Still on the Market – Lab Testing Matters Caveat Emptor—Buyer Beware! Pregnancy Devices that Give False Negative Results Still on the Market – Lab Testing Matters](http://www.labtestingmatters.org/wp-content/uploads/2019/10/positive-pregnancy-test-picture-id111919955.jpg)
Caveat Emptor—Buyer Beware! Pregnancy Devices that Give False Negative Results Still on the Market – Lab Testing Matters
![So yesterday my girlfriend a pregnancy test and it came out negative . I woke up the next day though and noticed this very faint line on it and I was wondering So yesterday my girlfriend a pregnancy test and it came out negative . I woke up the next day though and noticed this very faint line on it and I was wondering](https://i.redd.it/3grampm1hvi81.jpg)
So yesterday my girlfriend a pregnancy test and it came out negative . I woke up the next day though and noticed this very faint line on it and I was wondering
![Positive And Negative Pregnancy Tests.illustration Isolated On White Royalty Free SVG, Cliparts, Vectors, and Stock Illustration. Image 52129604. Positive And Negative Pregnancy Tests.illustration Isolated On White Royalty Free SVG, Cliparts, Vectors, and Stock Illustration. Image 52129604.](https://previews.123rf.com/images/jehsomwang/jehsomwang1602/jehsomwang160200007/52129604-positive-and-negative-pregnancy-tests-illustration-isolated-on-white.jpg)