What do decidua and villi mean?

Villus is a kind of tissue form during the growth of fertilized eggs in female reproductive system, which looks like villus and is called villus in medicine. Decidua is a kind of tissue formed by endometrial tissue in female reproductive cavity under the action of progesterone, which provides protection and nutrition for fertilized eggs. Simply put, what your daughter-in-law miscarries, villi is what will develop into a fetus in the future, and decidua is her endometrium. Since it fell out, the pregnancy failed. However, you still have to take her to the hospital for a B-ultrasound examination of the reproductive system to see if there is any residue in the uterus. If there is, it is necessary to do curettage.