{"componentChunkName":"component---src-components-article-page-article-page-gatsby-container-tsx","path":"/articles/cycle-a-z/heavy-periods-consider-your-thyroid","result":{"data":{"articleNode":{"id":"3htV6AejOoAiUYimKSqaoC","title":"Heavy periods? Consider your thyroid","subtitle":null,"seoMetaTitle":"Heavy periods? Consider your thyroid","seoMetaDescription":"A possible cause of heavy periods is hypothyroidism, or underactive thyroid.","openGraphTitle":null,"openGraphDescription":null,"slug":"cycle-a-z/heavy-periods-consider-your-thyroid","artCredits":null,"publishDate":"2017-11-01T00:00+01:00","updatedAt":"2020-02-24T15:37:11.416Z","createdAt":"2017-12-14T10:33:41.058Z","locale":"en","authors":[{"id":"3pIuxsaHMA4yGwUQoy82Sk","name":"Dr. Lara Briden","headline":"Author","slug":"dr-lara-briden","twitter":null,"locale":"en","profileImage":{"id":"3ZgdYW58TKI8cgicIyo6ae","description":"","file":{"contentType":"image/png","url":"//images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png"},"gatsbyImageData":{"images":{"sources":[{"srcSet":"https://images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png?w=225&h=225&q=50&fm=webp 225w,\nhttps://images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png?w=450&h=450&q=50&fm=webp 450w,\nhttps://images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png?w=900&h=900&q=50&fm=webp 900w","sizes":"(min-width: 900px) 900px, 100vw","type":"image/webp"}],"fallback":{"src":"https://images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png?w=900&h=900&q=50&fm=png","srcSet":"https://images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png?w=225&h=225&q=50&fm=png 225w,\nhttps://images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png?w=450&h=450&q=50&fm=png 450w,\nhttps://images.ctfassets.net/juauvlea4rbf/3ZgdYW58TKI8cgicIyo6ae/8bd8495d569e7539754bb0c4b611b4e5/Author_image_Dr._Lara_Biden.png?w=900&h=900&q=50&fm=png 900w","sizes":"(min-width: 900px) 900px, 100vw"}},"layout":"constrained","backgroundColor":"#181818","width":900,"height":900}}}],"reviewers":null,"editors":null,"featuredImage":{"description":"close up photograph of a womans thyroid","file":{"contentType":"image/png","url":"//images.ctfassets.net/juauvlea4rbf/2QmWamYbvWaamUSYciAygo/1b9f0783b24b9513b1acffea7a81124e/heavy-periods-consider-your-thyroid_2x.png"},"gatsbyImageData":{"images":{"sources":[{"srcSet":"https://images.ctfassets.net/juauvlea4rbf/2QmWamYbvWaamUSYciAygo/1b9f0783b24b9513b1acffea7a81124e/heavy-periods-consider-your-thyroid_2x.png?w=240&h=120&q=50&fm=webp 240w,\nhttps://images.ctfassets.net/juauvlea4rbf/2QmWamYbvWaamUSYciAygo/1b9f0783b24b9513b1acffea7a81124e/heavy-periods-consider-your-thyroid_2x.png?w=480&h=240&q=50&fm=webp 480w,\nhttps://images.ctfassets.net/juauvlea4rbf/2QmWamYbvWaamUSYciAygo/1b9f0783b24b9513b1acffea7a81124e/heavy-periods-consider-your-thyroid_2x.png?w=960&h=480&q=50&fm=webp 960w","sizes":"(min-width: 960px) 960px, 100vw","type":"image/webp"}]},"layout":"constrained","backgroundColor":"#582808","width":960,"height":480}},"openGraphImage":null,"sectionDivider":null,"featuredVideoURL":null,"category":{"id":"4zjthp6LJMfoiYDdWpEt03","slug":"bleeding","title":"Bleeding","color":null,"description":{"description":"Articles about Bleeding."},"parentCategory":{"title":"Menstrual Cycle","slug":"menstrual-cycle"},"locale":"en"},"body":{"body":"[Heavy menstrual bleeding](/articles/cycle-a-z/heavy-periods-how-to-tell-if-your-heavy-periods-are-normal) can affect up to 1 in 4 women (1). It’s defined as blood loss of greater than 80\nmL or lasting longer than eight days (2). To visualize this, 80 mL equates to 16\nfully soaked regular tampons, or eight fully soaked super-tampons over all the\ndays of your period, or repeatedly soaking through a pad or tampon every two\nhours.\n\nIf you experience heavy menstrual bleeding, please see your healthcare provider.\nThey will likely conduct investigations to determine the cause of your heavy\nbleeding. Possible causes include adenomyosis, fibroids, coagulation disorders,\nand “unopposed estrogen,” which means a hormone imbalance of too much estrogen\nand not enough progesterone (3).\n\n> Tip: Progesterone thins the uterine lining and prevents heavy menstrual flow\n(3).\n\nAnother possible cause of heavy periods is **hypothyroidism,** or underactive thyroid (4, 5).\n\n> Tip: The thyroid gland is located in the front of the throat and makes thyroid\nhormone, which regulates metabolism. When the thyroid is underactive, it cannot\nmake sufficient thyroid hormone.\n\n## How can an underactive thyroid cause heavy periods?\n\nThere are several mechanisms by which an underactive thyroid can make periods\nheavier:\n\n* Without sufficient thyroid hormone, your ovaries may not be able to make enough\nof the flow-decreasing hormone progesterone (6).\n* Without sufficient thyroid hormone, you may not make enough of the coagulation\nfactors you need to prevent heavy bleeding (7, 8).\n* Without sufficient thyroid hormone, you make less of the estrogen-binding\nprotein SHBG and so are exposed to more estrogen (3, 7).\n\nIf your healthcare provider discovers that you have an underactive thyroid, then\nyour best treatment for heavy periods may be to take thyroid hormone (9).\n\nLara Briden is a naturopathic doctor with 20 years of experience in women’s\nhealth. Her book is [Period Repair\nManual](http://www.larabriden.com/period-repair-manual/): Natural Treatment for\nBetter Hormones and Better Periods. Follow her on\n[Twitter](https://twitter.com/@larabriden) and\n[Instagram](https://www.instagram.com/larabriden/)."},"bodyRichText":null,"references":{"references":"1. Fraser IS, Mansour D, Breymann C, Hoffman C, Mezzacasa A, Petraglia F. Prevalence of heavy menstrual bleeding and experiences of affected women in a European patient survey. Int J Gynaecol Obstet. 2015 Mar;128(3):196–200.\n2. Fraser IS, Critchley HO, Broder M, Munro MG. The FIGO recommendations on terminologies and definitions for normal and abnormal uterine bleeding. Semin Reprod Med. 2011 Sep;29(5):383–90.\n3. Melmed, S., & Williams, R. H. (2011). Williams textbook of endocrinology (12th ed.). Philadelphia: Elsevier/Saunders. Page 68.\n4. Kakuno Y, Amino N, Kanoh M, Kawai M, Fujiwara M, Kimura M, Kamitani A, Saya K, Shakuta R, Nitta S, Hayashida Y, Kudo T, Kubota S, Miyauchi A. Menstrual disturbances in various thyroid diseases. Endocr J. 2010;57(12):1017–22.\n5. Weeks AD. Menorrhagia and hypothyroidism. Evidence supports association between hypothyroidism and menorrhagia. BMJ. 2000 Mar 4;320(7235):649.\n6. Datta M, Roy P, Banerjee J, Bhattacharya S.Thyroid hormone stimulates progesterone release from human luteal cells by generating a proteinaceous factor. J Endocrinol. 1998 Sep;158(3):319–25.\n7. Poppe K, Velkeniers B, Glinoer D. Thyroid disease and female reproduction. Clin Endocrinol (Oxf). 2007 Mar;66(3):309–21.\n8. Squizzato A, Romualdi E, Büller HR, Gerdes VE. Clinical review: Thyroid dysfunction and effects on coagulation and fibrinolysis: a systematic review. J Clin Endocrinol Metab. 2007 Jul;92(7):2415–20.\n9. Stoffer SS. Menstrual disorders and mild thyroid insufficiency: intriguing cases suggesting an association. Postgrad Med. 1982 Aug;72(2):75–7, 80–2."},"partnerships":null,"relatedArticles":null,"articleFooterDownloadWidgetText":null},"recommendedArticles":{"edges":[{"node":{"id":"4qbkbUS0kweSg8YgqmG2sM","title":"How much period blood is normal?","slug":"cycle-a-z/what's-normal-period-volume-and-heaviness","snippet":"You can expect around five tablespoons of blood during menstruation, but every person differs. What is normal for you may not be normal for someone else.","locale":"en","publishDate":"2024-05-21T00:00+02:00","authors":[{"id":"73B7NdaTtGDJM4kGkQIhZA","name":"Janelle McSwiggan, MSN, RN","headline":"Science writer","slug":"janelle-barowski-msn-rn","twitter":null,"locale":"en","profileImage":{"id":"7szHGWOvaIpDQFDJZkfl3V","description":"","file":{"contentType":"image/png","url":"//images.ctfassets.net/juauvlea4rbf/7szHGWOvaIpDQFDJZkfl3V/ebcc2458e5c2567a71692b80fcf1f635/IMG_2415.PNG"},"gatsbyImageData":{"images":{"sources":[{"srcSet":"https://images.ctfassets.net/juauvlea4rbf/7szHGWOvaIpDQFDJZkfl3V/ebcc2458e5c2567a71692b80fcf1f635/IMG_2415.PNG?w=225&h=225&q=50&fm=webp 225w,\nhttps://images.ctfassets.net/juauvlea4rbf/7szHGWOvaIpDQFDJZkfl3V/ebcc2458e5c2567a71692b80fcf1f635/IMG_2415.PNG?w=450&h=450&q=50&fm=webp 450w,\nhttps://images.ctfassets.net/juauvlea4rbf/7szHGWOvaIpDQFDJZkfl3V/ebcc2458e5c2567a71692b80fcf1f635/IMG_2415.PNG?w=900&h=900&q=50&fm=webp 900w","sizes":"(min-width: 900px) 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