I have been talking to many breeders lately and wondering why on earth shipped eggs are having a negative impact on hatch rate. Well, I searched around and first thought why not check out usps.com I typed in "x-ray" and got a faq about it. It is basically about anthrax BUT at the end: Taken directly from http://faq.usps.com/eCustomer/iq/usps/request.do?create=kb:USPSFAQ&view()=c%5Bc_usps011510%5D&varset(source)=sourceType:embedded "Additional Mail Security Measures Is Mail X-Rayed? Some of the mail that is sent through the United States Postal Service will pass through an X-Ray machine. There are no specific guidelines as to what may or may not be x-rayed, though mail sent to or through larger cities is likely to pass through an X-Ray machine. Note: Marking a mailpiece "Do Not X-Ray" will not forgo the X-Raying of a mailpiece, and may result in the item being considered suspicious If you have additional questions about X-Raying of items, contact your local Post Office. Irradiation/Sanitation The only mail currently being irradiated is mail sent to federal government agencies in WashingtonDC, for ZIP Codes beginning with 202, 203, 204 and 205. Mail to these Zones is accumulated at a site near the Brentwood Road facility, and then shipped to New Jersey to be irradiated. This process in New Jersey takes approximately 24 hours. Mail can take three (3) to five (5) days longer to reach its destination than it did prior to irradiation, but is generally not more than three (3) days. Mail returned from New Jersey is aired out for a short period before it is processed at a postal location designated for sorting all Government mail. Once the United States Postal Service provides mail to Congress and other affected government groups, some have their own mail rooms that do additional security checking before the mail is sorted and actually given to the recipients. Customers may send either Priority Mail or Express Mail items for expedited handling. This mail is not irradiated unless it is sent to the White House. Mail may arrive in a plastic bag(gie) with a letter explaining the sanitization process (if the mail was sanitized). Irradiation can have a negative effect on some plant, food, medical and electronic devices. While some people have reported mild symptoms after handling irradiated mail, substantial biological and medical testing has found no link between irradiated mail and those symptoms. Because the irradiation process can dry out paper and "yellow" the mail, there may be more paper dust or roughness associated with this mail. The irradiation process does not create any harmful radiation. The process was developed in consultation with scientists and experts both within and outside the federal government, led by the White House Office of Science and Technology." With this information presented, I unmark my box but insure. What are your opinions on getting eggs safe and sound to it's recipient in terms of labeling? Apparently "Do NOT X-ray" isn't a good idea.