Selected Birth Defects in California
Source: California Birth Defects Monitoring Program registry data. Cases are actively ascertained from medical record review in hospitals, genetics centers, and chromosome laboratories. Diagnoses to age 1 are included.
To minimize the random variation inherent in small numbers, we report 5-year averages from 8 counties that are a representative sample of California’s birth population. Rates from these counties are similar to those throughout the State.