Scientists are making progress in developing a vaginal ring to protect against not only unintended pregnancy but also HIV transmission. As noted by the Global Campaign for Microbicides, "Today's prevention options --condoms, mutual monogamy, and STI treatment-- are not feasible for millions of people around the world, especially women. Many women do not have the social or economic power necessary to insist on condom use and fidelity or to abandon partnerships that put them at risk. Because microbicides would not require a partner's cooperation, they would put the power to protect into women's hands."

Given that women now account for more than one quarter of all new HIV/AIDS diagnoses, that contraception is never one-size-fits-all, and that safe sex means protection from STIs (sexually transmitted infections) as well as unintended pregnancy, safe, microbicidal birth control could be a big step in the right direction.