The information requested falls within the responsibility of the UK Statistics Authority. I have asked the Authority to reply.
Letter from Karen Dunnell, dated May 2008:
As National Statistician I have been asked to reply to your request for information on the average age of a first-time mother in (a) the North West and (b) England in the most recent period for which figures are available. (204978)
It is not possible to provide the information requested because the number of previous children born to a woman is not collected from all mothers at birth registration.
Estimates of the mean age at first birth are published for England and Wales as a whole. ONS supplements the information on previous children collected from married mothers at birth registration with survey data to produce estimates of first births for England and Wales. However, it is not possible to produce these estimates for England or for sub-national areas.