This article was originally posted at my Scientific American blog.

Visit theperfect46.com, and it looks like any business web page. The Perfect 46 purports to be a company that uses the power of genomics, the information stored in the entirety of your DNA–your genome–to determine if you are with “the one” for you. This is not about your perfect romantic match, but rather the perfect genetic match that ensures your offspring will be free from known genetically heritable diseases.