What are long-acting reversible contraception methods?

The intrauterine device (IUD) and the birth control implant are long-acting reversible contraception methods. Both are highly effective in preventing pregnancy. They last for several years and are easy to use. Both methods are reversible—if you want to get pregnant or if you want to stop using them, you can have them removed at any time.

How effective are long-acting reversible contraception methods?

The IUD and the implant are the most effective forms of reversible birth control available. During the first year of use, fewer than 1 in 100 women using an IUD or implant will get pregnant. Over time, LARC methods are 20 times more effective than birth control pills, the patch, or the ring.

Do long-acting reversible contraception methods protect against sexually transmitted infections?

The IUD and the implant do not protect against sexually transmitted infections (STIs), including human immunodeficiency virus (HIV). A male or female condom also should be used to provide STI protection if you are at risk of getting an STI. You are at risk of getting an STI if you

What is the intrauterine device?

The IUD is a small, T-shaped, plastic device that is inserted into and left inside the uterus. There are two types of IUDs:

  1. The hormonal IUD releases the hormone progestin into the uterus. There are different brands of hormonal IUDs that last for different lengths of time. Depending on the brand, they are approved for up to 3–5 years of use. The following are the 3-5 year IUDs inserted in office:
    • Kyleena
    • Lyletta
    • Mirena
    • Skyla
  2. The copper IUD releases copper into the uterus. This IUD does not contain hormones. It is approved for up to 10 years of use. The copper IUD is called Paragard.

How does the intrauterine device work?

The IUD works mainly by preventing fertilization of an egg by sperm. The progestin in the hormonal IUD thickens mucus found in the cervix. Thicker mucus makes it harder for sperm to enter the uterus and reach an egg. Progestin also thins the lining of the uterus.

The copper in the copper IUD interferes with sperm’s ability to move. When sperm stop acting normally, it is harder for them to enter the uterus and reach an egg.

What are the benefits of the intrauterine device?

The IUD has the following benefits:

How is the intrauterine device placed?

An obstetrician–gynecologist (ob-gyn) or other health care professional must place an IUD. He or she will review your medical history and will perform a pelvic exam. The IUD will be guided through the vagina and the cervix and then into the uterus.

Will I feel anything when the intrauterine device is placed?

Placement of the IUD may cause some temporary discomfort. Taking over-the-counter pain relief medication such as ibuprofen before or after placement may help.

The IUD has strings made of thin plastic threads. Your ob-gyn or other health care professional will use the strings to remove the IUD when you decide to stop using it. The strings should not bother you, but in rare cases your sexual partner may feel them during sex. If this occurs and it is a concern, your ob-gyn or other health care professional may be able to trim the strings.

How is the intrauterine device removed?

When you are ready to stop using the IUD, your ob-gyn or other health care professional will remove it during a pelvic exam. He or she will grasp the strings with an instrument and gently pull out the IUD. Removal of an IUD usually takes less time than IUD placement.

What are possible side effects of using the intrauterine device?

When a woman uses an IUD, changes in menstrual bleeding are normal and not harmful. With the copper IUD, painful periods and bleeding may increase during the first months of use. Over-the-counter pain relievers may be used for pain and bleeding.

Hormonal IUDs may cause frequent spotting, more days of bleeding, and heavier bleeding in the first months of use. Over time, the amount of menstrual bleeding and the length of your menstrual period usually decrease. Menstrual pain also usually decreases. For some women using a hormonal IUD, menstrual bleeding stops completely. Some women also may experience other side effects, including headaches, nausea, breast tenderness, and mood changes.

What are possible risks of using the intrauterine device?

Serious complications from IUDs are rare. However, some women do have problems. These problems usually happen during or soon after insertion:


Birth Control Implant: A small, single rod that is inserted under the skin in the upper arm by a health care professional. It releases a hormone and protects against pregnancy.

Cervix: The lower, narrow end of uterus at the top of the vagina.

Ectopic Pregnancy: A pregnancy in which the fertilized egg begins to grow in a place other than inside the uterus, usually in one of the fallopian tubes.

Egg: The female reproductive cell produced in and released from the ovaries; also called the ovum.

Emergency Contraception: Methods that are used to prevent pregnancy after a woman has had sex without birth control, after the method she used has failed, or if a woman is raped.

Fertilization: Joining of the egg and sperm.

Human Immunodeficiency Virus (HIV): A virus that attacks certain cells of the body’s immune system and causes acquired immunodeficiency syndrome (AIDS).

Intrauterine Device (IUD): A small device that is inserted and left inside the uterus to prevent pregnancy.

Miscarriage: Loss of a pregnancy.

Obstetrician–Gynecologist (Ob-Gyn): A physician with special skills, training, and education in women’s health.

Ovulation: The release of an egg from one of the ovaries.

Pelvic Exam: A physical examination of a woman’s reproductive organs.

Pelvic Inflammatory Disease (PID): An infection of the uterus, fallopian tubes, and nearby pelvic structures.

Progestin: A synthetic form of progesterone that is similar to the hormone produced naturally by the body.

Sexually Transmitted Infections (STIs): Infections that are spread by sexual contact, including chlamydia, gonorrhea, human papillomavirus (HPV), herpes, syphilis, and human immunodeficiency virus (HIV, the cause of acquired immunodeficiency syndrome [AIDS]).

Sperm: A cell produced in the male testes that can fertilize a female egg.

Uterus: A muscular organ located in the female pelvis that contains and nourishes the developing fetus during pregnancy.

Vagina: A tube-like structure surrounded by muscles leading from the uterus to the outside of the body.

Source: acog.org