![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
![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
![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](https://www.labtestingmatters.org/wp-content/uploads/2019/10/positive-pregnancy-test-picture-id111919955-900x520.jpg)
Caveat Emptor—Buyer Beware! Pregnancy Devices that Give False Negative Results Still on the Market – Lab Testing Matters
![Pregnancy test on white background. Vector set illustration. Positive and negative results. 22868829 Vector Art at Vecteezy Pregnancy test on white background. Vector set illustration. Positive and negative results. 22868829 Vector Art at Vecteezy](https://static.vecteezy.com/system/resources/previews/022/868/829/original/pregnancy-test-on-white-background-set-illustration-positive-and-negative-results-vector.jpg)
Pregnancy test on white background. Vector set illustration. Positive and negative results. 22868829 Vector Art at Vecteezy
![Is pregnancy possible with delayed periods with negative pregnancy tests? - Dr. Teena S Thomas - YouTube Is pregnancy possible with delayed periods with negative pregnancy tests? - Dr. Teena S Thomas - YouTube](https://i.ytimg.com/vi/J4eDVibQAsw/maxresdefault.jpg)