Sponge

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Sponge placement

The sponge is a soft, disk-shaped device made from polyurethane foam that fits over a woman's cervix. It releases spermicide slowly over 24 hours and serves to block and absorb semen.

Effectiveness rate. For women who have never had children, the typical effectiveness rate of the sponge is 84 percent, meaning 16 out of 100 women using it for one year will get pregnant. Some reports suggest a decline in effectiveness in women who've had children.

The contraceptive sponge fits over the cervix to block and absorb semen and kill sperm.

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Side effects and health risks. Some sponge users complain of vaginal dryness, itching or soreness. Others experience allergic reactions to sponge materials or difficulty removing the sponge. Sponges don't provide protection against STDs.

How to use the sponge. If you decide to use the sponge, insert it just before intercourse or up to 24 hours ahead of time. Here are some additional tips for sponge insertion:

• Remove the sponge from its package, moisten it with about 2 tablespoons of clean water and squeeze it once.
• Insert the sponge into the vagina and slide it along the vagina until it rests against your cervix.
• Check with your finger to make sure you can feel your cervix covered by the sponge. Once inserted, the sponge offers protection for up to 24 hours.

After sexual activity, leave the sponge in place for at least six hours.

Cost and availability. A single contraceptive sponge costs about $2.50. The Today Sponge is available in the United States at local retailers and online. Other sponges, such as the Protectaid Sponge, are available outside the United States and online.