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Horse cloning
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<p>Horse cloning is the process of obtaining a horse with <a href="/facts/Gene/e1swwPY6">genes</a> identical to that of another horse, using an artificial <a href="/facts/Fertilisation/g8u3UKzF">fertilization</a> technique. Interest in this technique began in the 1980s. The Haflinger foal <a href="/facts/Prometea/FCmMdSyu">Prometea</a>, the first living cloned horse, was obtained in 2003 in an Italian laboratory. Over the years, the technique has improved. It is mainly used on high-performance but castrated or infertile animals, for reproductive cloning. These horses are then used as breeding stock. Horse cloning is only mastered by a handful of laboratories worldwide, notably in France, Argentina, North America and China. The technique is limited by the fact that some differences remain between the original and its clone, due to the influence of <a href="/facts/Mitochondrial_DNA/goC0ex0X">mitochondrial DNA</a>. </p><p>Reproductive cloning of the <a href="/facts/Pieraz/0GXfcoxK">Pieraz</a> and <a href="/facts/Quidam_de_Revel/HymHfA68">Quidam de Revel</a> horses began in 2005. The <a href="/facts/International_Federation_for_Equestrian_Sports/ELfp49LP">International Federation for Equestrian Sports</a> (FEI by its acronym in French) decided to ban clones from competition in 2007, before authorizing them in 2012. A few clones are used in <a href="/facts/List_of_equestrian_sports/KrrBTQc1">equestrian sports</a>, winning major titles such as the Argentine <a href="/facts/Polo/tm0j516j">polo</a> championship in 2013. Nevertheless, the number of cloned horses is growing every year. The practice is highly controversial, particularly for <a href="/facts/Bioethics/deT0les8">bioethical reasons</a>, since it involves a high failure rate on <a href="/facts/Embryo/9QHnLVLN">embryos</a>. It also raises questions about the management of horses' <a href="/facts/Genetic_diversity/GIymbUr8">genetic diversity</a>, the future of the <a href="/facts/Horse_breeding/kQpY19aX">horse breeding</a> profession, and the outbreak of new <a href="/facts/Genetic_disorder/hFqt2NLn">genetic disorders</a> or fraud. </p><p>The horse is the seventh <a href="/facts/Species/oDg6b96r">species</a> to be cloned yet. </p>