This is called a decidual cast. It occurs when the lining of a
![](https://i.redd.it/p0h17ai6i5b81.jpg)
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Woman Goes Viral for Detailing Rare Experience of Decidual Cast, Shedding Uterus Lining All At Once
![](https://www.aafp.org/content/dam/brand/aafp/pubs/afp/issues/2018/1001/p449-f1.jpg)
Fleshy Mass Passed Vaginally by a Young Woman
![](https://img.buzzfeed.com/buzzfeed-static/static/2022-12/12/21/asset/02ee823cd8d4/sub-buzz-3604-1670879639-38.jpg)
Decidual Cast: This Woman Passed Her Entire Period At Once
![](https://i.redd.it/6plezesxhrf61.png)
meowr_11 (u/meowrii_) - Reddit
Possible decidual cast? *GRAPHIC IMAGE* - Trying to Conceive, Forums
![](https://i.dailymail.co.uk/1s/2022/12/13/22/65554897-11534699-image-a-1_1670970202077.jpg)
Nurse raises awareness for decidual cast after experiencing the 'traumatic' menstrual condition
What is the function of the uterus lining? - Quora
![](https://clinmedjournals.org/articles/ogcr/ogcr-5-137-001.jpg)
Non-Painful Out of Pill Membranous Dysmenorrhoea
![](https://cdn.britannica.com/32/117432-050-8C3BE02A/state-development-human-embryo-pregnancy.jpg)
Pregnancy - Uterus, Placenta, Development
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This Nurse's TikTok About Passing a Decidual Cast During Her Period Is Harrowing
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therealsuper_KT (u/therealsuper_KT) - Reddit
![](https://b.thumbs.redditmedia.com/4Ct3-Z2cfms9TBpF726ShraMvYWgfPPTdNOlNoKWGiI.jpg)
Cursed Fruit Rollup : r/forbiddensnacks
![](https://hips.hearstapps.com/cosmopolitan-uk/16/01/1452331131-decidual-cast-2.jpg)
What is a decidual cast? See photos and learn the cause behind it
![](https://i.dailymail.co.uk/1s/2022/12/13/23/65558099-0-image-a-3_1670975468942.jpg)
Nurse raises awareness for decidual cast after experiencing the 'traumatic' menstrual condition
WTF JUST CAME OUT OF MY VAGINA? - March 2021 Babies, Forums