Résumé : Past history of suicidal behaviour was investigated in 51 depressed women (27 unipolar and 24 bipolar) in whom the TSH response to TRH was studied. Patients with a history of violent suicidal attempts were shown to have a reduced TSH response to TRH, compared to depressed patients with a history of non-violent suicidal attempts and depressed patients with no history of suicidal behaviour. A five-year follow-up study on these patients revealed that four patients who died from suicide had an absence of TSH response to TRH.