Another tool for the prevention of unintended pregnancy has recently been approved by the FDA: ulipristal acetate (marketed under the brand name ella®), a type of emergency contraception that can be taken up to five days after unprotected sexual intercourse. The medication is already in use in Europe, and the FDA conducted its own clinical trials before approving it as a prescription contraceptive on August 13. Ella was found to be safe and effective, and better at preventing pregnancy than current forms of emergency contraception, such as Plan B.
While Plan B can be taken up to three days after unprotected intercourse, its effectiveness is dependent upon how soon it is taken after sex. Plan B taken immediately after unprotected intercourse is more effective than when it is taken three days afterward. Ella, on the other hand, has been found to be just as effective on the fifth day as it is on the first day. According to the New York Times:
Women who have unprotected intercourse have about 1 chance in 20 of becoming pregnant. Those who take Plan B within three days cut that risk to about 1 in 40, while those who take ella would cut that risk to about 1 in 50, regulators say. Studies show that ella is less effective in obese women. Continue reading