Medroxyprogesterone Acetate Found to Have No Therapeutic Use in Competition Horses and has Been Linked to Anaphylaxis and Fatalities; Ban Effective December 1, 2019 by US Equestrian Communications Department | Nov 13, 2019, 11:33 AM EST Lexington, Ky. – The United States Equestrian Federation (USEF) Board of Directors has voted to prohibit the use of...Read More