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Closing the Effectiveness Gap |
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| June 2007 Issue No. 13 |
The INFO Project • Johns Hopkins Bloomberg School of Public Health • Center for Communication Programs • 111 Market Place, Suite 310 • Baltimore, Maryland 21202, USA • 410-659-6300 • 410-659-6266 (fax) • www.infoforhealth.org • infoproject@jhuccp.org | |
Figure 3: Counseling Aid
Explaining Effectiveness of Injectable Contraceptives
The Paling Palette© below is a visual representation of a woman’s risk of becoming pregnant during one year of not using any contraception at all (left) and during the first year of use of progestin-only injectables (right). The illustration depicts 100 women and shows pregnancy risk in both positive and negative terms at the same time. For example, among 100 women using progestin-only injectables 3 would become pregnant during the first year (shown by shading three women in the illustration on the right) (120). The risk is shown in positive terms by leaving the remaining 97 women unshaded. In contrast, among 100 women not using contraception 85 would become pregnant over the course of one year (left) (120). (Conventionally, the Paling Palette uses 1,000 human figures to show risks with probabilities as low as 1 in 1,000.) Family planning providers can use such tools with their clients to help show the risks of pregnancy with contraceptive methods visually rather than with numbers, which can be difficult to grasp.
No Method |
Progestin-Only Injectables |
85 = Women not using contraception who become pregnant over the course of one year |
3 = Women using progestin-only injectables who become pregnant during the first year |
15 = Women not using contraception who do not become pregnant over the course of one year |
97 = Women using progestin-only injectables who do not become pregnant during the first year |
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The Three Categories of Contraceptive Methods |
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1. Methods that are inherently highly protective against pregnancy and are nearly impossible to use imperfectly: female sterilization, vasectomy, hormonal IUD, copper IUD, and implants.
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2. Methods for which proper use plays an important role in contraceptive effectiveness: oral contraceptives and injectables.
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3. Methods that have a wide range of typical-use pregnancy rates among different studies and groups of users: diaphragm, fertility awareness methods, female condom, male condom, withdrawal, and spermicide.
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Illustrations by: Rita Meyer, Fran Mueller, Mark Beisser, and Rafael Avila/CCP |
INFO Reports |
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85 = Women not using contraception who become pregnant over the course of one year
15 = Women not using contraception who do not become pregnant over the course of one year





