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This video discusses how over-the-counter pregnancy tests work, why women urinate on a small plastic sticks and what reactions are taking place to display the positive or negative result within seconds. The video is the first in the Pregnancy 101 series that delve into the different stages of pregnancy from conception to birth, while unravelling the common questions asked by expecting parents and curious minds, from answering what exactly happens during pregnancy to potential complications that can come about. • This video was made by McMaster Demystifying Medicine students Shara Chowdhury, Vanessa Miranda, Mishaal Qazi and Peter Tso • Copyright McMaster University 2017 • References: • Kalinski, M. A., Guss, D. A. (2002). Hemorrhagic shock from a ruptured ectopic pregnancy in a patient with a negative urine pregnancy test result. Annals of emergency medicine, 40(1), 102-105. • Martin, L. (2017). How do pregnancy tests work?. Health Guidance. Retrieved from http://www.healthguidance.org/entry/1... • Pregnancy test. Planned Parenthood. (2017). Retrieved from https://www.plannedparenthood.org/lea... • Wilcox, A. J., Baird, D. D., Weinberg, C. R. (1999). Time of implantation of the conceptus and loss of pregnancy. N Engl J Med, 1999(340), 1796-1799.
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