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.
Tagged under: Pregnancy test,Ancient Egypt,hCG,Pregnancy,Placenta,TED,TED-Ed,TEDx,TED Education,Tien Nguyen,Andrew Foerster,Rewfoe,Enzyme,Antibodies,Test,Sandwich assay,Control zone,Urine sample,False positive,Scientific method
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