Narrator: In the horse-breeding world, genetics is king. Wealthy investors are willing to pay high prices for proven winners' semen, hoping that the resulting foal ... 95% of all thoroughbred ...

Many were surprised at how thoroughbred breeding works in practice, even for champions like Black Caviar ... with their foals. It's also important to consider the quantity of horses being bred.

The name accurately describes this breed of horse: they all have ... Today, the U.S. is the world center of Thoroughbred racing and breeding, with about 55,000 foals registered every year.