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. . It’s been a good couple of months for the Science and Conservation Center, a Billings-based nonprofit that develops wildlife contraceptives. The center produces porcine zona pellucida (PZP), which is the active ingredient in a contraceptive vaccine. In February, … Continue reading →

The Environmental Protection Agency (EPA) announced the registration of a contraceptive vaccine for horses.  The vaccine, porcine zona pellucida (PZP) has been registered under  the name ZonaStat-H and is the first contraceptive vaccine approved for use in equids. The active … Continue reading →