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CRYPTORCHIDISM

When a colt is growing inside his dam's uterus, his testicles develop inside his abdominal cavity, just behind the kidneys. At some point before his birth, or during the first couple of weeks after he's born, the testicles normally descend into the scrotal sac. “A string-like structure called the gubernaculums guides the testicles into place,” explains Dr. Nicola Cribb, a professor at the Ontario Veterinary College. “The pressures of the abdominal contents also help force the testicles into the scrotum.” But not always. Sometimes one or both testicles don't make it all the way into the scrotal sac, but become lodged in the horse's abdomen, flank or just at the edge of the scrotal sac. The horse is then called a cryptorchid, ridgling, or rig. In cryptorchid testicles that are located outside of the abdomen, it can take more than a year for the testicle to completely descend; the testicles…

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