This is called a decidual cast. It occurs when the lining of a

Decidual Cast: What It Looks Like, Causes, Risks

therealsuper_KT (u/therealsuper_KT) - Reddit

stitch with @gabygabss WTF fell out of me?! 😳 #decidualcast, decidual cast

Impact and Hope: Living with Endometriosis by Erin McMahon — QENDO

therealsuper_KT (u/therealsuper_KT) - Reddit

Decidual Cast (TW: uterine lining) : r/endometriosis

meowr_11 (u/meowrii_) - Reddit

What is a decidual cast? See photos and learn the cause behind it

What is an Endometrial Polyp?

What Is A Decidual Cast? Decoding This Mysterious Period Symptom