The sponge is a round piece of white plastic foam with a little dimple on one side and a nylon loop across the top that looks like shoelace material. It's pretty small--just two inches across--and you insert it way up in your vagina before you have sex. The sponge works in two ways: It blocks your cervix to keep sperm from getting into your uterus, and it continuously releases spermicide. Think of it like a bouncer at the nightclub door to your uterus.
No hormones, no prescription, and can be inserted up to 24 hours before sex.
For more info on this tidbit click here http://glw.io/85ZrI