Final answer:
Myometritis is the inflammation of the muscular wall of the uterus.
Step-by-step explanation:
When the muscular wall of the uterus becomes inflamed, it is referred to as myometritis. The myometrium is the middle layer of the uterus made up of thick smooth muscle tissue. Inflammation in this layer can cause pain and discomfort. Other conditions mentioned in the options are not specifically related to inflammation of the muscular wall of the uterus.