Animated Explanation of How Pregnancy Tests Work

Tien Nguyen explains how pregnancy tests work in the latest TED-Ed video animated by Andrew Foerster.

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.