The typical use for Gynol II vaginal contraception is to use for prevention of pregnancy with a diaphragm. The vaginal contraception is a jelly that is applied to the cup of the diaphragm no more then six hours prior to intercourse. The advantage is that it allows the woman to protect herself. The disadvantages is that it is for a one time use only, so additional applicators are needed for more then one use. Sold over the counter.