March 1 (Reuters) - A California couple sued a Pasadena-based fertility clinic on Wednesday, saying it allegedly implanted an embryo carrying a rare gene that causes deadly stomach cancer and then falsified records to cover up its mistake. "We deeply empathize with this family's situation," HRC said in a statement, adding that the Diazes "wished to have a male embryo transferred, which we carried out according to the family's explicit wishes and in accordance with the highest level of care. See here for a complete list of exchanges and delays