title: A cyclic tetrapeptide with antiimplantation activity.
mesh_terms: D000818:Animals; D003864:Depression, Chemical; D010064:Embryo Implantation / Q000187:drug effects*; D005260:Female; D010456:Peptides, Cyclic / Q000494:pharmacology*; D011247:Pregnancy; D051381:Rats
chemical_list: D010456:Peptides, Cyclic