Valley Teen Clinic

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Birth Control

Implanon

What is the Implanon and how does it work?

“IMPLANON® is a flexible plastic rod the size of a matchstick that is put under the skin of your arm.

IMPLANON® contains a hormone called etonogestrel. You can use a single IMPLANON® rod for up to three years. Because IMPLANON® does not contain estrogen; your healthcare provider may recommend IMPLANON® even if you cannot use estrogen.”

“IMPLANON® prevents pregnancy in several ways. The most important way is by stopping release of an egg from your ovary. IMPLANON® also changes the mucus in your cervix and this change may keep sperm from reaching the egg. Also, IMPLANON® changes the lining of your uterus.”

 

What are my chances of not getting pregnant by using the Implanon?

If the IMPLANON is inserted correctly, the chance of her getting pregnant is less than 1%.  The IMPLANON is 99.8% effective.

 

Are there any side effects from using the Implanon?

The most common side effect of the IMPLANON is change in a women’s menstrual period.  Periods may become lighter or heavier when on the IMPLANON.  Other common side effects are: “headache; vaginitis; weight gain; acne; breast pain; viral infections such as colds, sore throats, sinus infections, or flu-like symptoms; stomach pain; painful periods; mood swings; nervousness or depression; back pain; nausea; dizziness; pain; and pain at the site of insertion.”

 

What are the Pros of using the Implanon?

“Using Implanon is safe, simple, and convenient. Women like the implant because

  • The ability to become pregnant returns quickly when you stop using Implanon.
  • It can be used while breastfeeding.
  • It can be used by women who cannot take estrogen.
  • It gives continuous long-lasting birth control without sterilization.
  • There is no medicine to take every day.
  • Nothing needs to be put in place before vaginal intercourse.”


 

What are the Cons of using the Implanon?

“Some women may have undesirable side effects while using Implanon. But many women adjust to it with few or no problems.

Irregular bleeding is the most common side effect, especially in the first 6–12 months of use.

  • For most women, periods become fewer and lighter. After one year, 1 out of 3 women who use Implanon will stop having periods completely.
  • Some women have longer, heavier periods.
  • Some women have increased spotting and light bleeding between periods.”