Fremgangsmåde til on-demand svangerskabsforebyggelse

摘要

The invention relates to a method for on-demand contraception, which method comprises administering a progestogen agent or progesterone receptor modulator, such as 17a-acetoxy-11b-(4-N,N-dimethylamino-phenyl)-19-norpregna-4,9-diene-3,20-dione (ulipristal acetate) in a woman, within 72 hours before an intercourse or within 120 hours after the intercourse.