How do pregnancy tests work? - Tien Nguyen

View full lesson: http://ed.ted.com/lessons/how-do-pregnancy-tests-work-tien-nguyen

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.

Lesson by Tien Nguyen, animation by Andrew Foerster.

Видео How do pregnancy tests work? - Tien Nguyen канала TED-Ed