The proportion of live births in England and Wales to women born outside the UK has fallen for the first time in nearly three decades.
Some 28.2% of births in 2018 were to women not born in the UK, down slightly on 28.4% in 2017.
It is the first year-on-year decrease since 1990, according to figures from the Office for National Statistics (ONS).
In total, just over a third (33.8%) of babies born in England and Wales in 2018 had at least one parent who was born outside the UK.
This was also a small decrease on the previous year.
Kathryn Littleboy of the ONS said these parents “could be long-time residents who moved here when they were younger, or those who moved to the UK more recently.”
She added: “Poland and Pakistan remain the most common countries of birth for non-UK-born mothers and fathers respectively.
“Romania is now the second most common country of birth for non-UK-born fathers and the third for non-UK-born mothers.”
Figures on live births to foreign-born women date back to 1969, when the proportion for England and Wales stood at 11.7%.
The number first rose above 15% in 2000, above 20% in 2005 and above 25% in 2010.
For the third year in a row, Brent in London was the local authority in England with the highest percentage of live births to non-UK-born mothers at 75.4%.
Copeland in Cumbria had the lowest – 3.0%.
The local authority outside London with the highest proportion of non-UK-born mothers was Slough in Berkshire, with 65.2%.