The Potential Cost of the Best Genes Money Can Buy

Brown eggs cost more than white at my supermarket. From large through extra-large to jumbo, there's an orderly progression of prices, with a premium for color.

There is a market in human eggs, too, although we judge them by different criteria.

The latest story about human eggs comes from early March, when a couple advertised in newspapers on the campuses of such universities as Harvard, Princeton, and