XY sex reversal in a mare.
D000818:Animals; D012734:Disorders of Sex Development; D005260:Female; D006059:Gonadal Dysgenesis / Q000662:veterinary*; D006734:Horse Diseases / Q000175:diagnosis*; D006736:Horses; D012729:Sex Chromosome Aberrations; D014960:X Chromosome; D014998:Y Chromosome