How do pregnancy tests work? - Tien Nguyen
4:34
YouTubeTED-Ed
How do pregnancy tests work? - Tien Nguyen
Dig into the science of how modern over-the-counter pregnancy tests detect pregnancy with such a high rate of accuracy. -- 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 ...
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