Compliance with the Perinatal National Minimum Data Set specifications has improved since the previous evaluation for 2001 to 2005. For 2006 to 2009, all states and territories used the national standard definition, domain values and provided data for greater than 99.5% of records in scope for 11 data elements. Compliance with the correct National Health Data Dictionary definition by all states and territories improved from 79% of data elements in 2006 to 81% in 2009, however, compliance with the use of the correct domain values and scope declined.