Choosing a method of contraception is as important as selecting a physician. Choose a risky one and you may suffer medical consequences. Choose one that doesn't fit your lifestyle or personality and you probably won't use it, or you will use it inconsistently. There are about 10 kinds of contraceptives, including abstinence, birth control pills, barrier methods, intrauterine devices (IUD), injections and emergency contraceptive pills (ECPs).

The withdrawal method - or coitus interruptus - has often been criticized as ineffective. But, if practiced correctly, it works as well as barrier methods, such as the diaphragm and the cervical cap. One disadvantage to withdrawal is that it does not prevent sexually transmitted diseases (STDs). Advantages include no cost, no chemicals and no side effects.

The male condom is considered highly effective in preventing pregnancy and STDs, and it is a popular because of the low cost. But condoms are also risky. People use them inconsistently because of lack of sensitivity, erection problems and allergic reactions. Use a condom each time you have sex and be sure to put it on correctly. Also, do not use oil-based lubricants with condoms.

Depo-Provera (DMPA) and Norplant are grouped together because of their function. DMPA is injected in the arm every 12 weeks and works extremely well - even if a woman is late for her injection. Studies show Norplant is 100 percent effective and is easy to use because one implant - in the inside upper arm - lasts five years. Women have experienced weight gain, acne and depression with each of these methods.