The invention relates to kisspeptide-pentasaccharide conjugates having the general formula (I) wherein Z1 is Tyr or D-Tyr; Z3 is Trp, Hyp, Phe or Lys(R2); Z5 is Thr, Aib or Ala; Z7 is Gly or azaGly; Z8 is Leu; or Z7 and Z8 together represent; Z10 is Phe or Trp; n is 0 or 1; or R2, when present, represents a pentasaccharide derivative having the formula (II) wherein R is methyl or SO3X; X is a positively charged counterion; with the proviso that when R2 is present, R1 is H or (C1-6) alkylcarbonyl; R3 is H or (C1-3)alkyl; and L represents a pharmacologically inactive linker moiety having 10-50 atoms; or a pharmaceutically acceptable salt thereof; to pharmaceutical compositions comprising the same as well as to the use of said kisspeptide-pentasaccharide conjugates in the treatment of female infertility.