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A pessary is a medical device inserted into the vagina, either to provide structural support, or as a method of delivering medication.
An assortment of pessaries
Types of pessaries 
Different types of pessaries
Therapeutic pessaries 
A therapeutic pessary is a medical device similar to the outer ring of a diaphragm. Therapeutic pessaries are used to support the uterus, vagina, bladder, or rectum. A pessary is most commonly used to treat prolapse of the uterus. It is also used to treat stress urinary incontinence, a retroverted uterus, cystocele and rectocele. Historically, pessaries may have been used to perform abortions.
The pessary can be placed temporarily or permanently, and must be fitted by a physician, midwife, or advanced practice nurse. Some pessaries can be worn during intercourse.
Pharmaceutical pessaries 
A pharmaceutical pessary is used as a very effective means of delivery of pharmaceutical substances easily absorbed through the skin of the vagina or rectum, or intended to have action in the locality, for example against inflammation or infection, or on the uterus.
Occlusive pessaries 
Main article: Cervical cap
An occlusive pessary is generally used in combination with spermicide as a contraceptive.
Stem pessary 
The stem pessary, a type of occlusive pessary, was an early form of the cervical cap. Shaped like a dome, it covered the cervix, and a central rod or "stem" entered the uterus through the os, to hold it in place.
See also