Abstract: The present invention relates to a glycine transporter-1 inhibitor having the formula (I) wherein X is 1-3 substituents selected from H, halogen, methyl, methoxy, trifluoromethyl and trifluoromethoxy and Y is 1-3 substituents selected from H, methyl and halogen or a pharmaceutically acceptable salt thereof for use in a treatment in humans to suppress the level of one or more hormone selected from luteinizing hormone, follicle-stimulating hormone, estradiol and testosterone. The present invention further relates to such a glycine transporter-1 inhibitor as part of a contraceptive regimen or as a treatment for hypersexuality.

Abstract: The invention relates to thieno[2,3-d]pyrimidine derivatives according to general formula I, or a pharmaceutically acceptable salt thereof, wherein N(R1)R2 are joined in a (2-6C)heterocycloalkyl ring. The compounds of the invention have LH as well as FSH receptor activating activity and can be used in fertility regulating therapies.

Abstract: The invention relates to thieno[2,3-d]pyrimidine derivatives according to general formula I, or a pharmaceutically acceptable salt thereof, 1

Abstract: The invention relates to 22S hydroxycholesta-8, 14-diene derivatives having general formula (I) wherein R1 is OR, OSO3H or —NOR; with R being H, (C1-6)alkyl or (C1-6)acyl; each of R2 and R3 is independently hydrogen or (C1-6)alkyl; R4 is hydrogen, (C1-6)alkyl or (C1-6)acyl; R5 is hydrogen; or R5 designates, together with R6, an additional bond between the carbon atoms at which R5 and R6 are placed; R6 is hydrogen, hydroxy or halogen, or R6 designates, together with R5, an additional bond between the carbon atoms at which R6 and R5 are placed; each or R7 and R8 is independently hydrogen or (C1-4)alkyl, optionally substituted with OH, (C1-4)alkoxy, or halogen; or a pharmaceutically acceptable salt thereof. The compounds of the invention have meiosis activating activity and can be used for the control of fertility.