In the United States there are very few regulations concerning the collection, processing, distribution and insemination of stallion semen. Any owner who can manage to extract semen from his or her stallion can without any prior training, experience, certification or license, sell semen from that stallion without restriction of any kind. There are only a few individual states that require certain testing for diseases potentially transmitted in semen but in most cases there is no requirement for such screening within the breeding population in the U.S. The USDA has regulations concerning the importation of semen and breeding animals into the U.S. from other countries but there is no USDA oversight to regulate the horse breeding industry within the borders of the country. This is also true in many other countries as well.