Method

Six small rods are inserted under the skin of a woman's upper arm, and these rods release the synthetic hormone progestin, that prevents pregnancy.

Success Rate

Less than one woman in 1,000 becomes pregnant in one year.

Benefits

It protects against pregnancy for up to five years--without your having to do a thing. Plus, it starts working within 24 hours of insertion.

Drawbacks

Doesn't protect against STDs including HIV; may cause irregular periods, headaches, weight gain, and acne. Some women may be able to see the rods under the skin. Plus, having the rods removed can be a hassle.

How To Get It

Requires a visit to a health care provider; the cost for insertion is usually about $500-$800, while the removal usually costs more because it takes more time to do.

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