Birth—birth order, code N

Implementation start date: 01/07/2006

Implementation end date: 30/06/2007

Implementation start date: 01/07/2005

Implementation end date: 30/06/2006

Implementation start date: 01/07/2007

Implementation end date: 30/06/2008

Implementation start date: 01/07/2008

Implementation end date: 30/06/2010

Implementation start date: 01/07/2010

Information specific to this data set:

Birth order is only assigned to births that are in scope for the Perinatal NMDS (i.e. births of at least 20 weeks gestation or 400g birth eight).  In the case of multiple pregnancies, if one or more fetuses were removed from the uterus before 20 weeks gestation, for example, by abortion (spontaneous, induced or fetal reduction), they are not considered in the assignment of birth order for any remaining fetuses that are born.  For example, in a twin pregnancy, where one fetus is aborted before 20 weeks, no birth order would be recorded for that twin.  If the remaining twin is born and is in scope for the Perinatal NMDS, then their birth order would be recorded as ‘1 Singleton or first of a multiple birth’.  If both twins are born and are in scope for the Perinatal NMDS, the first twin will be assigned a birth order of ‘1 Singleton or first of a multiple birth’ and the second twin will be assigned a birth order of ‘2 Second of a multiple birth’.

In the case of multiple births, this item should be recorded for each baby born.