1. A method of contraception, including the introduction, as necessary, of a progestogen or progesterone receptor modulator to a woman within 72 hours before sexual contact. The method of claim 1, wherein the progesterone receptor modulator is 17α-acetoxy-11β- [4-N, N-dimethylamino-phenyl] -19-norpregna-4,9-diene-3,20-dione (ulipristal acetate) or its metabolite. 3. The method of claim 1, wherein the progestogen agent or progesterone receptor modulator is administered within 48 hours prior to sexual contact. The method of claim 1, wherein the progestogen agent or progesterone receptor modulator is administered within 24 hours prior to sexual contact. The method of claim 1, wherein the progestogen agent or progesterone receptor modulator is administered within 12 hours prior to sexual contact. The method of claim 1, wherein the progestogen agent or progesterone receptor modulator is administered orally. The method according to claim 2, wherein ulipristal acetate or its metabolite is administered in a dosage of 10 mg to 40 mg. The method according to claim 7, wherein ulipristal acetate or its metabolite is administered in a dosage of 30 mg. The method of claim 7, wherein ulipristal acetate or a metabolite thereof is administered in a dosage of 20 mg. The method of claim 1, further comprising administering a progestogen or progesterone receptor modulator within 120 hours after sexual intercourse. The method of claim 1, which is repeated once a week. A method according to claim 1, which is repeated twice during the menstrual cycle. A method according to claim 1, which is repeated three times during the menstrual cycle. The method of claim 1, wherein the progestogen agent or progesterone receptor modulator is not administered for more than four consecutive days. The method of claim 1, wherein the progestogen agent or1. Способ контрацепции, включающий введение по мере необходимости прогестогенного средства или модулятора рецепторов прогестерона женщине в пределах 72 ч до
