The aims were to study the validity and test-retest reliability of the Early Trauma Inventory-Self Report (ETI-SR) and its short-form (ETI-SF), which retrospectively assess different childhood trauma, in a sample of Spanish postpartum women. A total of 227 healthy postpartum women completed the ETI-SR and ETI-SF. The longitudinal, expert, all data procedure was used as the external criterion for the assessment of childhood trauma. The ETI-SR and ETI-SF were also administered to a sample of 102 postpartum depressive women (DSM-IV) and the results were compared with those of the healthy postpartum sample. The area under the curve values of the ETI-SR and ETI-SF were 0.77 (95% confidence interval [CI], 0.71-0.84) and 0.78 (95% CI, 0.72-0.85), the internal consistencies of the 2 scales were 0.79 and 0.72, and the intraclass correlation coefficients were 0.92 (95% CI, 0.80-0.97) and 0.91 (95% CI, 0.78-0.96), all respectively. The ETI-SR and ETI-SF had higher test-retest reliability on all subscales. The ETI-SR and ETI-SF are shown to be valid and reliable instruments for assessing childhood trauma in postpartum women.