Birth defects are a leading cause of infant and childhood mortality and morbidity. Reporting of birth defects began in Michigan in 1992. The reports collected are used to prepare statistical tables on the numbers and types of birth defects. Select Birth Defects to access information on birth defects numbers and rates and the mortality experience of children with birth defects. Information is presently available for children born during 1992 through 2002. Mortality data are provided through 2003. County level data are also provided.