Intrauterine use 18 - methyl - 14B, 16B - methylene - 19 nor espirox 20 - - 4 - - 3 - onas, intrauterine Systems containing 18 Methyl 14B, 16B - methylene - 19 nor espirox 20 - - 4 - - 3 - ona, as well as its use in contraception and Gynecologic Therapy

摘要

Claim 1: application of intrauterine 18 - methyl - 15B, 16B - methylene - 19 nor espirox 20 - - 4 - - 3 - onas of the General formula (1) where ru2076 and ru2077 is a hydrogen Atom or a Methyl Group - together.Claim 5: intrauterine system according to claim 3, wherein the system releases a daily dose of 200 mg 1 - 18 - methyl - 14B, 16B - methylene - 19 nor espirox 20 - - 4 - - 3 - ona.