Implanon™ New Highly Effective Contraceptive

On July 17, 2006 the FDA approved one of the most effective hormonal contraceptives ever developed, called Implanon™. It is a flexible plastic rod the size of a matchstick that is put under the skin on the inner side of your upper arm. Implanon™ contains a hormone called etonogestrel also found in some birth control pills. Implanon™ prevents pregnancy for three years in several ways. The most important way is by stopping release of an egg from your ovary. Implanon™ changes the mucus in your cervix which may keep sperm from reaching the egg. Also, Implanon™ changes the lining of your uterus so it’s unreceptive for egg implantation. Your chance of getting pregnant is very low (less than one pregnancy per 100 women who use Implanon™ for one year).

Because Implanon™ contains only progestin and provides up to 3 years of protection without daily, weekly, or even monthly action, so t is well-suited for:

  • Women who wish to or need to avoid estrogen (e.g. minimizes attributable side-effects of nausea, headaches, and blood clots)
  • Teens who find adherence to a contraceptive regimen difficult
  • Current Depo-Provera® users looking for greater convenience & avoiding adverse effects on bone density
  • Healthy adult women who desire the convenience of long-term protection
  • Women who are breastfeeding

The most common side effect of Implanon™ is a change in your menstrual periods. Expect your menstrual period to be irregular and unpredictable throughout the time you are using Implanon™. Usually you’ll have less bleeding, and some will have no bleeding. The time between periods may vary, and you may have spotting in between periods. Some women do gain weight.

Your doctor can remove Implanon™ at any time, but must do so after three years when the implant runs out of hormones. If you want to become pregnant after Implanon™ removal, your ability to get pregnant should return quickly. In conclusion, most women are satisfied with Implanon®, citing its long duration, high efficacy, and convenience.

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