… Imagine that you want to buy a horse. You pay for a horse, and what is delivered to you is a fertilized horse egg. You would probably feel cheated. You canít ride or race a fertilized horse egg. It isnít a horse. Even in Texas. You need a mare and a lot of development. A single cell isnít a horse, a cluster of undifferentiated cells (technically, a ďblastocystĒ) isnít a horse, a cluster of differentiated cells isn’t a horse, a horse embryo isn’t a horse, and a horse fetus isn’t a horse. You would feel cheated if you were sold any of them….