Final answer:
The medical term for the sagging or falling of the uterus into the vagina is 'uterine prolapse,' which happens when pelvic support structures are weakened.
Step-by-step explanation:
The medical term for the sagging or falling of the uterus into the vagina is uterine prolapse. This condition occurs when the pelvic floor muscles and ligaments stretch and weaken, providing inadequate support for the uterus. As a result, the uterus can protrude into the vagina, which may lead to symptoms such as pressure, discomfort, and incontinence. Uterine prolapse is generally associated with childbirth, but it can also occur due to the strain from heavy lifting or chronic coughing. Treatments can range from pelvic floor exercises to surgical interventions, depending on the severity of the prolapse.