Aside from the ethical and moral issues that accompany the use of contraceptives, one biomedical and social aspect of interest is to determine their efficacy, particularly when this is compared with natural fertility regulation methods, and most especially when it involves choosing contraceptives that acts through an anti-conception or anti-implantation mechanism.
Contraceptives latest findings:
A recent article in the American Journal of Obstetrics and Gynecology, published in July this year, compared the efficacy of different contraceptive methods in a group of 9,252 women over a period of 2 to 3 years. In the first part, they evaluated the pregnancy rate at 1, 2 and 3 years, and the mean pregnancy rate. For the methods used as a whole, the overall mean rate was 3.1 pregnancies when the 3 years were evaluated jointly, and 2.7, 5.9 and 9.1 if evaluated at 1, 2 and 3 years, respectively. When the pregnancy rate per 100 women-years is considered, naturally, the contraceptive failure rates are lower. Although efficacy is high, we must not forget their negative side effects and, especially, the moral difficulties entailed in their uses.