While the safest method of birth control, in terms of minimal risk of side effects, is likely natural methods such are much riskier in terms of contraceptive success. In terms of the most effective birth control method, implants and intrauterine devices (IUDs) are the most effective at preventing pregnancy, as they work 99 percent of the time. In comparison, birth control injections are 94 percent effective, while birth control pills are 91 percent effective. Natural methods, such as the withdrawal method, are approximately 70 to 80 percent effective. Additionally, the potential side effects of birth control implants only occur in rare circumstances. The vast majority of individuals who choose this contraceptive method do not experience side effects and can become pregnant immediately after the implant is removed should they choose to do so. In the rare event that side effects do occur, the implant can be removed safely and easily. With that being said, birth control implants do not protect against sexually transmitted diseases or infections (STDs or STIs), as condoms are the only birth control method that does so.