Objectives: The aim of this longitudinal study was to evaluate the long-term effects of providing a therapeutic conversation intervention, based on Family Systems Nursing, to family caregivers of a close relative with advanced cancer over the period before and during bereavement. Background: To prevent adverse outcomes, caregivers need ongoing support that begins pre-loss and extends into the post-loss period. Methods: This study employed a one-group pre-test, post-test quasi-experimental design.