Learn more about “PZP (Porcine Zona Pellucida)”

Porcine Zona Pellucida (PZP) is a humane fertility-control vaccine used to manage wild horse populations effectively. Administered via remote darting, PZP prevents fertilization without affecting hormonal systems, thus preserving natural behaviors. With over 30 years of scientific backing, it boasts an efficacy rate of 91.5% to 97%, making it a preferred alternative to inhumane roundups and removals. PZP is safe for pregnant mares and has been successfully implemented in various regions, including the Virginia Range and Assateague Island. This cost-effective solution not only reduces population growth but also enhances the welfare of wild horses, aligning with the goals of the American Wild Horse Conservation.