The U.S. Food and Drug Administration approved ella™ (ulipristal acetate) tablets for emergency contraception. The prescription-only product prevents pregnancy when taken orally within 120 hours (five days) after a contraceptive failure or unprotected intercourse. It is not intended for routine use as a contraceptive. ella is a progesterone agonist/antagonist whose likely main effect is to inhibit or delay ovulation. Since May 2009, the prescription product has been available in Europe under the brand name ellaOne...
