The IUD is a small T-shaped plastic device inserted into the uterus that is over 99% effective at preventing pregnancy for years without needing to do anything else. It works by changing how sperm move and preventing them from reaching eggs. The IUD is very safe and does not cause infections or infertility. Common side effects include cramping and irregular bleeding that usually improve within 3-6 months. Women who want highly effective birth control they don't have to think about often choose IUDs.

1. IUD
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size!
The basics
This tiny, t-shaped plastic device is inserted into the uterus. Once placed, the
IUD works for years­—you don’t have to do a thing. It’s more than 99% effective
at preventing pregnancy, and you can get it removed whenever you want.
How does it work?
The IUD works with your body to change how sperm move and to stop them
from reaching an egg.
Is it safe?
The IUD is a very safe birth control option. It doesn’t cause infection or
infertility.
What can I expect?
You may have cramping when the IUD is inserted, and some women feel
discomfort the first few days after insertion. Taking ibuprofen (such as Advil)
before and after getting your IUD can help. Some women don’t experience
any side effects. The most common side effects are cramping and irregular
bleeding. These typically improve within 3 to 6 months.
Who uses it?
Women who want super effective birth control they don’t have to think
about—no remembering to take a pill or refill a prescription. Teens love
the IUD because it’s invisible and low-maintenance.
Learn about all your birth control options:
kp.org/mydoctor/birthcontrol

2. The basics
This thin, flexible rod gets placed under the skin of your upper arm. It’s
totally invisible, and it works for years. You don’t have to remember to take
a pill, fill a prescription, or do anything else—it just works. The implant is more
than 99% effective at preventing pregnancy, and you can get it removed
whenever you want.
How does it work?
The implant releases a hormone (progesterone) that prevents eggs from
leaving the ovaries. It also thickens cervical mucus so that sperm can’t get
through.
What can I expect?
You will feel a quick pinch during insertion. Some women don’t experience
any side effects. The most common side effect is irregular bleeding, which
typically improves within 6 to 12 months.
Who uses it?
Women who want super effective birth control they don’t have to worry
about for years. The implant is a great option for teens because it’s safe,
simple, and convenient.
Implant
Learn about all your birth control options: kp.org/mydoctor/birthcontrol
This information is not intended to diagnose health problems or to take the place of medical advice or care you receive from your physician or other
health care professional. If you have persistent health problems, or if you have additional questions, please consult your doctor.
Kaiser Permanente does not endorse the medications or products mentioned. Any trade names listed are for easy identification only.
© 2016. The Permanente Medical Group, Inc. All Rights Reserved. Regional Health Education.
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size!