How do pregnancy tests work?
9,445,360 views|
Tien Nguyen |
TED-Ed
• July 2015
Over-the-counter pregnancy tests give potentially life-changing results with a pretty high rate of accuracy. But how do they work? Tien Nguyen explains how each test performs a scientifically rigorous, multi-stage experiment that goes from start to finish in the time that it’ll take you to watch this video. [Directed by Andrew Foerster, narrated by Susan Zimmerman].