Abstract: The invention concerns a 3-methylene steroid derivative selected from the group consisting of (7&agr;,17&bgr;)-7-methyl-3-methyleneestr-5(10)-en-17-ol, (5&bgr;,7&agr;,17&agr;)-5,10-epoxy-7-methyl-3-methylene-19-norpregn-20-yn-17-ol, (5&bgr;,7&agr;,17&bgr;)-5,10-epoxy-7-methyl-3-methyleneestran-17-ol, (5&agr;,7&agr;,17&agr;)-7-methyl-3-methylene-19-norpregn-20-en-17-ol, (5&agr;,7&agr;,17&agr;)-7-methyl-3-methylene-19-norpregn-20-yn-17-ol, (5&bgr;,7&agr;,17&agr;)-7-methyl-3-methylene-19-norpregnan-17-ol, (7&agr;)-7-methyl-3,17-dimethyleneestr-5(10)ene, (7&agr;,16&agr;,17&bgr;)-7,16-dimethyl-3-methylene-17-(1-propynyl)estr-5(10)-en-17-ol, (7&agr;,16&agr;,17&bgr;)-16-ethyl-7-methyl-3-methylene-17-(1-propynyl)estr-5(10)-en-17-ol, (7&agr;,17&bgr;)-7-methyl-3-methylene-17-(1 -propynyl)estr-5(10)-en-17-ol, (7&agr;,16&bgr;,17&bgr;)-16-ethyl-7-methyl-3-methylene-19-norpregn-5(10)-en-20-yn-17-ol, (7&agr;)-3-methylene-7-methylestr-5(10)-ene, (7&agr;)-3-methylene-7-methylestr-5(10)-en-17-one O-methyloxime and (7&agr;)-3-m