A long-acting, nonhormonal contraceptive for men, with thousands of men on the waitlist.

Dogs & Cats

Calcium chloride (“Calchlorin”), a low-cost, nonsurgical neuter shot available to vets now.

Breast Cancer

What if hormones aren't fuel for the fire after all? Surprising results point to benefits of hormones.


Veterinarians open to offering ovary-sparing spay, vasectomy and other alternatives to traditional spay/neuter

iStock_4516712_MegaPhone_BlueOur Mission

Parsemus Foundation works to advance innovative and neglected medical research. The foundation’s focus is on supporting small proof-of-concept studies and then pursuing press coverage of the results, so that the advances change treatment practice rather than disappearing into the scientific literature. Many of the studies we support involve low-cost approaches that are not under patent. When supporting development of technologies under patent, Parsemus Foundation coordinates with larger funders to make sure support is contingent upon strong public-sector pricing agreements.

Current areas of focus are contraceptive development (particularly long-acting nonhormonal male methods); nonhormonal contraception/nonsurgical sterilization for animals; and an alternative to aromatase inhibitors after breast cancer for better quality of life. And that’s not all– additional projects are listed in the page links above. Applications for support are by invitation only except where specifically noted. Please see Our History page for selected highlights and milestones.

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Recent News

Featured Studies

Ultrasound provides noninvasive hormone-sparing sterilization for male dogs

Raffaella pic dog ultrasound

The optimal ultrasound treatment regime for dog sterilization was determined, providing an option for pet owners who want birth control without the long-term health and behavior changes resulting from traditional neutering An Italian research team led by Dr. Raffaella Leoci recently reported in Reproduction in Domestic Animals the best method for using ultrasound to sterilize… Read more

Nonsurgical treatment for enlarged prostate on the horizon


A recent study on dogs offers hope for treating enlarged prostate (technically known as benign prostatic hyperplasia or BPH). Recently published in the online version of The Prostate, researchers from the University of Bari, Italy report that pulsed electromagnetic field therapy – or PEMF – significantly reduced the size of the prostate starting after just one week of treatment…. Read more