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How Do Pregnancy Tests Work? And Why "You Aren't Pregnant Until the Rabbit Done Died"
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More from TodayIFoundOut:
How Did They Get the CGI in the 1993 Jurassic Park to Look So Good?
https://youtu.be/l4UuQxjFpfU
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https://youtu.be/ejLFtO1ieRM
In this video:
In most cultures throughout history there was no reliable way for a woman in her first trimester to definitively know whether or not she was pregnant, with one of the leading "tests" through the ages using uroscopy- studying the colour, consistency, and taste of a woman's urine, with the practitioners colloquially called "piss prophets". Another interesting urine based method was dipping a ribbon in the urine and then burning it to study the smoke and the flame's colouration.
Want the text version?: http://www.todayifoundout.com/index.php/2013/02/how-pregnancy-tests-work/
Sources:
http://wwwchem.csustan.edu/chem4400/sjbr/maragoul.htm
http://history.nih.gov/exhibits/thinblueline/timeline.html
http://www.fda.gov/MedicalDevices/Safety/AlertsandNotices/TipsandArticlesonDeviceSafety/ucm109390.htm
http://laser.cheng.cam.ac.uk/wiki/images/6/67/ModernMetrology_Appendix.pdf
http://www.aeicbiotech.org/WhitePapers/training.pdf
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