This is called a decidual cast. It occurs when the lining of a woman's uterus sheds as one massive solid piece of tissue during her period. : r/MakeMeSuffer

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Decidual cast: Definition, symptoms, causes, and more

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is this decidual cast??? i am on depo provera (on my 2nd month

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I think I passed a decidual cast (TMI PICTURE)

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This Nurse's TikTok About Passing a Decidual Cast During Her

The tissue from Case 2, partial endometrium