There's a new form of birth control that women would only have to think about once every three years.

It's an implantable device called Implanon. It's been used in other countries since 1998, but is just now being prescribed in Topeka.

Cotton-O'Neil OB/GYN Dr. Robert Barnett says people want something that they don't have to worry about taking on a regular basis. He says that's why he expects demand to be high for Implanon.

Implanon is a progestine-only contraceptive, delivering the hormone through a single rod that's implanted under the skin on the inside of the arm. Dr. Barnett says the process is much like a simple injection, taking less than a minute and leaving a small hole that requires only a bandage over it.

Implanon can last up to three years. Unlike previous implanted contraceptives, Implanon's one rod, rather than six, makes it easier to remove if a woman no longer wants to use it. Dr. Barnett says it's just as or more effective than oral contraceptives, which are often used incorrectly.

The device and implanting it will cost around $900, comparable to a three-year supply oral contraceptives.

For more information on Implanon, visit www.IMPLANON-USA.com. You can also call 1-877-467-5266.