A pessary may be inserted any time the internal organs of the pelvis need extra mechanical support, reports WebMD. They are considered safe to wear continuously for days or weeks at a time, and can even be worn during sex, states FamilyDoctor.org.
A pessary is an object that is inserted into the vagina to provide support to the uterus, bladder and other pelvic organs, reports FamilyDoctor.org. They are worn to treat many different conditions, especially prolapsed uterus. Insertion can occur at any time of day, after which the pessary is generally left in for days or weeks at a time. Although pessaries can be left in place during sex, they cannot be used in combination with a diaphragm, states WebMD.