SciShow: Why Do People Have Periods When Most Mammals Don't?

Teacher or professor: SciShow
Subject: Science
Content of the Lesson: Few mammals actually get periods every month, or even at all, but why? Understanding what menstruation really is and why it happens could help ease symptoms & treat conditions that stem from the reproductive system. Hosted by: Olivia Gordon SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Kevin Carpentier, Eric Jensen, Matt Curls, Sam Buck, Christopher R Boucher, Avi Yashchin, Adam Brainard, Greg, Alex Hackman, Sam Lutfi, D.A. Noe, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://onlinelibrary.wiley.com/doi/full/10.1002/bies.201100099 https://academic.oup.com/biolreprod/article-abstract/91/4/98,%201-8/2434351 https://academic.oup.com/humupd/article/21/6/748/628724 https://www.jstor.org/stable/3036558 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4000068/ https://academic.oup.com/biolreprod/article/99/1/196/4898004 https://academic.oup.com/humrep/article/9/7/1202/746307 https://www.journals.uchicago.edu/doi/10.1086/419369 https://academic.oup.com/humrep/article/25/12/2944/552315 https://www.ncbi.nlm.nih.gov/pubmed/8693059 https://www.ncbi.nlm.nih.gov/pubmed/27862405 https://www.jstor.org/stable/2831191 https://www.ncbi.nlm.nih.gov/pubmed/12262232 http://jpet.aspetjournals.org/content/52/2/179 https://vcahospitals.com/know-your-pet/estrus-cycles-in-dogs https://www.newyorker.com/magazine/2019/01/14/the-history-of-blood https://psmag.com/news/a-brief-history-of-menstrual-blood-myths https://helloclue.com/articles/culture/top-euphemisms-for-period-by-language https://www.healthline.com/health/period-poop https://ucmp.berkeley.edu/mammal/eutheria/placental.html http://www.vivo.colostate.edu/hbooks/pathphys/reprod/placenta/structure.html https://www.nature.com/scitable/topicpage/chromosomal-abnormalities-aneuploidies-290/ Images: https://en.wikipedia.org/wiki/File:Trajan%27s_market.jpg


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