TABLE 1. Categorization of contraceptive methods by effectiveness.
| More effective contraceptiona |
| tubal ligation/sterilization |
| vasectomy |
| IUD (intrauterine device), coil, loop |
| emergency IUD insertion |
| Norplant |
| birth control pills |
| Patch (Ortho Evra) |
| ring (NuvaRing) |
| shot (Depo-Provera) |
| Less Effective Contraceptiona |
| condoms (rubbers) |
| female condom |
| diaphragm, cap or shield |
| natural family planning (safe periods by temperature, cervical mucus test) |
| rhythm or safe period by calendar; |
| emergency contraception or “morning after” pill |
| withdrawal (pulling out) |
| vaginal sponge |
| contraceptive film |
| spermicide foam, jelly, creme, suppositories |
a
wording is as used on the survey