Health status and sensitivity to side effects are other considerations. If you are already at high risk for stroke, for example, oral contraceptives might not be a good choice. However, oral contraceptives might be ideal if you have acne or severe PMS or perimenopause symptoms. Likewise, contraceptives such as diaphragms and spermicides can increase risk of urinary tract infections, particularly among those who are already prone to them, but are nonetheless favored by many women over 30.
"The cardinal rule of contraceptive is that a woman or a couple needs to find a method that they can use correctly and consistently," Trussell says. "We have a variety of contraceptives, and choice is good, because it increases the likelihood that an individual woman or couple can find the methods that is best for them."
| Percentage of Women with an Unintended Pregnancy During the First Year of Typical Use and the First Year of Perfect Use of Contraception * |
| Method | Typical Use | Perfect Use |
| Male sterilization | 0.15 | 0.10 |
| Female sterilization | 0.5 | 0.5 |
| IUD: Copper T | 0.8 | 0.6 |
IUD: levonorgesterel-containing intrauterine system | 0.1 | 0.1 |
| Depo-Provera | 3 | 0.3 |
| NuvaRing | 8 | 0.3 |
| Ortho-Evra patch | 8 | 0.3 |
| Combined pill and mini-pill | 8 | 0.3 |
| Male condom | 15 | 2 |
| Diaphragm | 16 | 6 |
| Withdrawal | 27 | 4 |
| Spermicides | 29 | 18 |
| No method | 85 | 85 |
* Adapted from Trussell, J. Contraceptive Technology, eighteenth edition revised. Ardent Media, 2004.