Birth control methods options chart.

IUD: intrauterine device; LNG: levonorgestrel; STI: sexually transmitted infection.

* The number of women out of every 100 who have an unintended pregnancy within the first year of typical use of each method. 
Other methods of birth control:

 (1) lactational amenorrhea method (LAM) is a highly effective, temporary method of contraception; and 
(2) emergency contraception: emergency contraceptive pills or a copper IUD after unprotected intercourse substantially reduces risk of pregnancy.