In the modern workplace, pregnant women are often discriminated against by their employers due to their lower performance compared to non-pregnant employees. While the prevailing notion assumes that pregnant women make less performance contribution to organizations, this research challenges this notion by suggesting that pregnant women can make unique contributions to enhance organization ethics. Specifically, drawing upon social cognition theory, we posit that pregnant women serve as “moral beacons” in the workplace, such that their presence constitutes a guiding and illuminating force, resulting in employees who work with them exhibiting higher moral awareness and in turn engage in less unethical behavior. Four studies conducted across the U.S. and China supported our hypotheses. In sum, this research supports an inspiring notion that retaining pregnant women in the workplace goes beyond merely achieving gender equality goal and offers substantial benefits for enhancing organizational ethics as well.