The Ring

What is the ring?

The ring is a removable, very effective form of birth control, although it does not prevent sexually transmitted infections (STIs). The small and bendable ring is inserted into the vagina every month, and then left there for three weeks. After three weeks it is removed for one week and then your period occurs.

Studies have shown that fewer than 1 out of 100 women who use the ring become pregnant with consistent and correct use.

How does it work?

The ring delivers estrogen and progestin to prevent pregnancy for the duration of one month. These hormones can prevent ovulation (release of an egg), and they sometimes cause the mucus on the cervix (the tip of the uterus) to become thicker, which prevents a sperm and an egg from joining. The hormones can sometimes also prevent a fertilized egg’s implantation in the uterus, which would result in pregnancy.

A new ring must be inserted exactly one week after removal, and taken out exactly three weeks after its insertion in order to prevent pregnancy.

How is it used?

The ring is inserted into the vagina and then removed exactly three weeks later on that same day of the week. There is no applicator for the ring, but it is flexible and can be inserted and removed with the fingers. After the ring is removed, the woman menstruates, and then exactly one week after removal, a new ring is inserted.

Does it protect against STIs?

No. The ring only protects against pregnancy. The only form of birth control that protects against STIs is a condom.

What are the benefits of use?

• Possibility of predictable and lighter menstrual periods


• Prevention of tubal pregnancy (pregnancy in the fallopian tubes instead of the uterus; this can be fatal for the fetus and mother if not detected early)


• Possible decreased risk of gynecologic cancer (such as cancer of the ovaries or uterus)


• Fewer premenstrual discomforts such as bloating, cramps and irritability


• Prevention of osteoporosis (bone density loss that can occur later in life)

Disadvantages/Side effects

These are similar to the side effects seen with birth control pills, and usually disappear within the first 2-3 months.

• Change in weight


• Tender breasts


• Alteration in mood


• Irregular bleeding

Very rare complications

These occur rarely, and more often when someone who uses the ring also uses hormone pills or other hormone contraceptives at the same time.

• Blood clots


• Tumors of the liver


• Elevated blood pressure

These risks are also increased if you are over age 35, smoke excessively (more than 15 per day), or have high blood pressure, diabetes or high cholesterol.

Where can I get the ring?

In order to get the ring you have to visit your doctor, who will help you decide if this is the best method of birth control for you. The doctor can then give you a prescription for the ring.

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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.
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