Conclusion
This RCT presents evidence that the teach-back method is an effective approach to enhancing MHL levels, changing health behaviours, and improving postpartum maternal-infant health outcomes among women with LMHL. The teach-back method could play an important role in improving postpartum maternal-infant health and should be considered in health education targeting pregnant and postpartum women with LMHL. However, research on its cost-effectiveness, long-term impacts, and user experiences is warranted.