The Intrauterine Device (IUD)

What is an IUD?

• A T-shaped, plastic device inserted into the uterus by a health care professional.


• There are two types of IUDs available:
• Copper


• Can remain in place for 10 years.
• Progesterone (natural female sex hormone)
• Replaced every year.
• IUDs prevent pregnancy by inhibiting fertilization of the egg. Although not entirely known, it is believed that the IUDs affect the way the sperm and egg move and/or affect the lining of the uterus to prevent implantation of the egg.


• The IUD is not recommended for teenagers because of increased risk of serious infection which can cause sterility.

How is it used?

• The IUD is inserted into the uterine wall by a health care provider, usually during menstruation. The string at the end of the IUD will hang down through the cervix into the vagina and should be checked periodically (especially after menstruation).

How is the IUD inserted?

Answer from Barbara Boyer, MD:

The IUD is inserted during an office visit. It is placed into the uterus through the cervix. The patient is placed on the table just like she is going to have a Pap smear. A speculum is inserted, like with a Pap smear. The area that the brush touches when you have a pap smear is your cervix. The IUD is inserted in through the cervix up about 1 inch into your uterus. This is moderately painful -- I usually ask people to take two Tylenol or ibuprofen before they come in for the procedure. After that, the string is cut and the speculum is removed.

Does it protect against STIs?
NO!

Does it protect against pregnancy?
Yes.

What are the chances of getting pregnant while using an IUD?

• Copper:
• Typical use: 0.8%


• Perfect use: 0.6%
• Progesterone:
• Typical use: 2%


• Perfect use: 1.5%

Advantages to using an IUD?

• With an IUD in place, the female does not have to think about using contraception when having sex, or every day in the case of the pill (although she should use other means to prevent against STDs).


• The IUD does not change the hormone levels throughout the body as do other contraception methods such as the pill.


• The cost of the copper IUD can be low in the long run compared to birth control methods that must be purchased more frequently.

Disadvantages to using an IUD?

• Menstrual cramps may increase.


• Bleeding may occur between periods.


• Periods may be heavier and last longer. This may cause anemia.


• Increases risk of serious infection (PID) and sterility.


• IUD may fall out.


• Pregnancy while using the IUD, although rare, may be dangerous and lead to infections or ectopic pregnancies.

Things you should know:
IUDs do not protect against STIs. Individuals who do not know the sexual health status of their partners, or feel they might be at risk for an STI, should use condoms to protect against infections.

---

Additional Outside Sources

Below is additional information and resources. Some are links to other Internet pages, which might have information on health topics of interest to you. PAMF, however, does not sponsor or endorse any of these sites, nor does PAMF guarantee the accuracy of the information contained on them. In addition, PAMF has no control over the privacy practices of external Web sites. The user should read and understand the policies of all Web sites with respect to their privacy practices. These links are provided for your general information and education only, and should NOT be relied upon for personal diagnosis or treatment. If you have questions, please contact your health care provider.

Planned Parenthood. Birth Control [Online]. Accessed March 2008.

The National Women's Health Information Center. Birth Control Methods [Online]. Accessed March 2008.
Back to top