A compound having 17beta-hydroxysteroid dehydrogenase type 2 (17β-HSD2) inhibitory activity of the formula wherein R1 and R3 are independently selected from H; -OH; straight-chain, branched-chain or cyclic alkoxy that may be saturated, unsaturated or partially unsaturated; acyloxy; straight-chain, branched-chain or cyclic alkyl that may be saturated, unsaturated or partially unsaturated; -N 2; -SR8; halogen; haloalkyl and phenyl; R2 and R4 are independently selected from H; -OR8; -COR8; -COOR8; -CONHR8; -OCOR8; -SR8; -SON 2; -SO 2 N 2; -N 2; -NHCOR8; -NHSOR8; -NHSO 2 R8; -halogen; -NO 2; -CN; -SO 2 R8; -CH 2 N 2; -CH 2 OR8; aryl optionally substituted with up to three R8; and straight-chain, branched-chain or cyclic alkyl that may be saturated, unsaturated or partially unsaturated and may optionally be substituted with up to three R8; R5 is C 1-6 alkyl; R8 is selected from H; straight-chain, branched-chain or cyclic alkyl that may be saturated, unsaturated or partially unsaturated and may optionally be substituted with up to three R9; -OH; -NO 2; C 1-6 alkoxy; C 1-6 alkyl; halogen; haloalkyl; -NH 2; -CN; -NHCOR9; -CONHR9; -NHSO 2 R9; -SO 2 NHR9; a 5- or 6-membered aromatic or heteroaromatic aryl ring optionally substituted with up to three R9; a homoaromatic ring that might be condensed with a 5- or 6-membered, aliphatic or aromatic heterocyclic ring and that (condensed) homoaromatic ring might optionally be substituted with up to three R9; R9 is selected from -OH; straight-chain, branched-chain or cyclic alkoxy that may be saturated, unsaturated or partially unsaturated; halogen; haloalkyl; C 1-6 alkyl; -NH 2; -NO 2; -CN and phenyl; R10 is selected from H, halogen, haloalkyl, C 1-6 alkyl; n is an integer selected from 0 to 2; X, Y and P are independently selected from CH, N, N, S and O; V is C or S; W is O or S; and T, if V is S, represents O or is absent, or, if V is C, is absent; or a salt thereof, for use in the treatment and/or prophylaxis of sex steroid deficient-diseases. R1 and R3 are independently selected from H; -OH; straight-chain, branched-chain or cyclic alkoxy that may be saturated, unsaturated or partially unsaturated; acyloxy; straight-chain, branched-chain or cyclic alkyl that may be saturated, unsaturated or partially unsaturated; -N 2; -SR8; halogen; haloalkyl and phenyl; R2 and R4 are independently selected from H; -OR8; -COR8; -COOR8; -CONHR8; -OCOR8; -SR8; -SON 2; -SO 2 N 2; -N 2; -NHCOR8; -NHSOR8; -NHSO 2 R8; -halogen; -NO 2; -CN; -SO 2 R8; -CH 2 N 2; -CH 2 OR8; aryl optionally substituted with up to three R8; and straight-chain, branched-chain or cyclic alkyl that may be saturated, unsaturated or partially unsaturated and may optionally be substituted with up to three R8; R5 is C 1-6 alkyl; R8 is selected from H; straight-chain, branched-chain or cyclic alkyl that may be saturated, unsaturated or partially unsaturated and may optionally be substituted with up to three R9; -OH; -NO 2; C 1-6 alkoxy; C 1-6 alkyl; halogen; haloalkyl; -NH 2; -CN; -NHCOR9; -CONHR9; -NHSO 2 R9; -SO 2 NHR9; a 5- or 6-membered aromatic or heteroaromatic aryl ring optionally substituted with up to three R9; a homoaromatic ring that might be condensed with a 5- or 6-membered, aliphatic or aromatic heterocyclic ring and that (condensed) homoaromatic ring might optionally be substituted with up to three R9; R9 is selected from -OH; straight-chain, branched-chain or cyclic alkoxy that may be saturated, unsaturated or partially unsaturated; halogen; haloalkyl; C 1-6 alkyl; -NH 2; -NO 2; -CN and phenyl; R10 is selected from H, halogen, haloalkyl, C 1-6 alkyl; n is an integer selected from 0 to 2; X, Y and P are independently selected from CH, N, N, S and O; V is C or S; W is O or S; and T, if V is S, represents O or is absent, or, if V is C, is absent;