When considering what method of birth control is best for you, many factors come into play. Some women are very sensitive to hormones, particularly estrogen. This rules out the birth control pill, a common method. The pill also isn't recommended for women who smoke and are over the age of 35. The IUD (intrauterine device) had all but disappeared in the eighties, with studies showing less than 1 percent of women in the mid-nineties using it as their method of protection from unplanned pregnancy.