A spokesman for the Office for National Statistics (ONS) has said that the fall in the average age of mothers since 1973 could be due to several factors:
Possible influences include increased participation in higher education, increased female participation in the labour force, the increasing importance of a career, the rising opportunity costs of child-bearing, labour market uncertainty, housing factors and instability of partnerships.
More top news
Rights groups believe the vote reflects international disapproval of Moscow's involvement in the war in Syria.
The reopening of the investigation into Hillary Clinton's e-mails came as a shock, writes Robert Moore - could it cost her the presidency?
A quiet and calm end to month and staying frost free tonight.