This Nurse's TikTok Video Explains 'Decidual Casts' – When Your Uterus Lining Sheds Whole

Have you ever heard of a decidual cast? The answer for a lot of people will most probably be ‘no’, but if you’re a person who has periods, it’s well worth cluing up on.

A decidual cast is essentially a large piece of tissue that passes through your vaginal canal. And the wildest thing about it? It’s often triangular in shape - an exact replica of your uterus – because a decidual cast is formed when your body decides to expel your entire uterine lining in one piece.

The Google images...