A "decidual cast" occurs when a womb sheds its lining in one go, rather than across several days. Here, a doctor explains why ...

Endometrial organoids, 3D cell cultures mimicking the endometrium, offer new opportunities in endometriosis research. These ...

However, if the released egg or ovum is not fertilized, then the endometrium starts shedding the blood and extra tissue that it had prepared. These sheddings of blood and tissue are what flow out ...

Periods involve shedding the 4–6 millimeter-thick endometrial ... The uterine muscles contract, expelling the blood and crumbled endometrium. The crumbled endometrium and blood mostly pass ...