The modern sponge combines both a barrier as well as spermicide in order to prevent conception. The sponge is concave and shaped like a dimple in order to fit directly over the cervix. The contraceptive sponge lasts for around 24 hours, and it should not be removed until 6 hours after the last time of intercourse.
How to Use
First, get the sponge a little bit wet and squeeze the water out (do not make it completely dry).
With the string hanging below, fold the sides of the sponge upward and push the sponge as deep as possible into the vagina.
Be careful when inserting the sponge to make sure it covers the cervix.
For removal, find the string and pull it out very carefully.
Do not flush it down the toilet, but throw away in a trashcan or other form of disposal.
Advantages
Is accessible over the counter.
Does not need to be fitted.
Lasts for up to 24 hours, allowing individuals to have sex multiple times.
Single use so it does not require cleaning like the diaphragm or cervical cap.
Can be disposed of easily
Disadvantages
Not as effective as a lot of other methods.
Spermicide can cause allergies or rashes.
Does not provide a means to protect against STIs.
Some studies have shown that it increases the chance of getting HIV.
Efficacy
If a woman has never given birth, the chances of the sponge failing are 16% for normal use and 9% if it is used perfectly. If a woman has given birth before, the chances slightly increase to 32% for normal use and to 20% for perfect use.
Availability
The sponge can be found at drugstores or supermarkets for around $1.50 each.
