Fertility-clinic breakdowns baffle experts, upset couples

Simultaneous refrigeration failures at two fertility clinics in San Francisco and suburban Cleveland have damaged or destroyed potentially thousands of frozen eggs and embryos in the biggest such loss on record in the U.S. The malfunctions have left parents-to-be heartbroken and baffled experts.Here are some questions and answers about the two cases.___WHAT HAPPENED?In Ohio, University Hospitals Cleveland Medical Center estimates 2,000 eggs and embryos may have been damaged or destroyed when an