# How do pregnancy tests work?

- Institution: TED
- Department: TED-Ed
- Speaker: Tien Nguyen
- Year: 2015
- Level: For everyone
- Language: English
- Subjects: Medicine and health, Engineering, Art, architecture and design, Teaching and learning
- Source: [TED](https://www.ted.com/talks/tien_nguyen_how_do_pregnancy_tests_work)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Adult profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

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. \[Directed by Andrew Foerster, narrated by Susan Zimmerman\].

## Lectures

1. [How do pregnancy tests work?](https://invisiblenetwork.ai/learn/ted/tien_nguyen_how_do_pregnancy_tests_work/208f361568d0), 5 min (TED's player)