I'm intrigued. Egg sexing??
For anyone who missed my earlier post or is unsure about my (attempted) explanation.
Check this out: http://www.motherearthnews.com/sustainable-farming/buying-fertilized-chicken-eggs-zmaz74zhol.aspx
or
http://www.chickenkeepingsecrets.com/chicken-eggs/egg-shape-as-indication-of-the-sex-of-a-chick/