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SpayVac pZP vaccine for wild horses, burros and deer - learn more here.


SpayVac® is a humane, non-lethal, environmentally friendly, single-dose innovation used for overabundant, mammalian wildlife.

SpayVac® need

Humans have had a profound impact on Earth’s ecosystems

 The Anthropocene is proposed as the current epoch, which is “viewed as the period during which human activity has been the dominant influence on climate and the environment”.  Many wildlife species, even if they are considered endangered, are overabundant in the ever-shrinking habitat ranges they occupy.

SpayVac®: A humane alternative

Overabundant species, even native ones, can reduce biodiversity by monopolizing resources, spreading infectious diseases, and changing species composition or relative abundance.

Latest News

SpayVac co-founder Dr. Ursula Bechert to present SpayVac Data at the International Urban Wildlife Conference

May  30,  2019.  Madison, WI.  SpayVac for Wildlife Inc co-founder, Dr. Urusula Bechert, DVM, PhD, will be giving a talk on SpayVac use at the International Urban Wildlife Conference in Portland, OR.  Her presentation is scheduled for June 4, 2019.  Dr. Bechert has extensive experience participating in field trials and doing research on SpayVac in horses and elephants. http://urban-wildlife.org/events.html

Dr. Bechert and Mr. Fraker Presented SpayVac Data at the Wild Horse Management Conference

May  18, 2019 Mark Fraker and Ursula Bechert recently gave a presentation at a Wild Horse Management Conference in Reno, NV, where delegates from more than 90 organizations gathered to discuss possible solutions to the overpopulation problem.  SpayVac has effectively prevented pregnancies in mares for 4+ years with a single injection, making it a front-runner in the race for effective immunocontraception.  Read more about the conference: https://thisisreno.com/2019/05/advocates-scientists-solutions-needed-now-for-wild-horse-management/?mc_cid=29b03e5b0c&mc_eid=a04ec9b8c1

Cofounders speaking about SpayVac at upcoming wildlife conferences.

May 2, 2019.  Dr Ursula Bechert and Mr Mark Fraker are in demand to speak at wildlife conferences on the topic of SpayVac.  They will be co-presenting data on SpayVac in wild horses at the Managing Free-roaming Equids and Sustainable Ecosystem conference in Reno, NV being held May 29-31, 2019.  

Mr. Fraker will be speaking on SpayVac at the 37th Annual Native American Fish & Wildlife Society Annual Meeting on May 20, 2019 in Phoenix AZ. 

Interest in SpayVac is very high as reflected by the demand for Mr Fraker and Dr Bechert to share information on SpayVac for leading wildlife control authorities around the world. 

SpayVac® pZP Vaccine Development


The only pZP vaccine to demonstrate up to 5 years of efficacy in deer with a single-dose is SpayVac®.  Trials with SpayVac have been done in both white-tail deer and fallow deer. 

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Other Mammalian Populations

SpayVac® has been tested in several invasive or overabundant mammalian wildlife species.

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Wild Horses

SpayVac® has been tested in three trials in horses demonstrating reduced fertility rates over a 2-5 year time frame with a single dose.

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SpayVac® blog posts


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