Every fifth child born in Germany last year had a mother holding citizenship from another country, a situation brought about by the mass influx of refugees into the nation, according to data released on Wednesday.
Mothers without a German passport bore 148,000 of the total 738,000 children delivered in 2015, the Federal Statistical Office (Destatis) said.
Turkish women represented the largest group of foreign mothers, with 21,555 children, followed by Polish mothers with 10,831 newborns.
However, the numbers of Syrian mothers having children doubled last year, amid the arrival of about 1 million refugees - many fleeing Syria's five–year-old civil war.
Last year 4,800 Syrian mothers had children in Germany – up from 2,300 in 2014, Destatis said.
The jump resulted in the number of newborn children with foreign mothers climbing to 20 per cent for the first time, Destatis said.
Between 1996 and 2014, the share of mothers with foreign passports averaged between 17 and 18 per cent, the statistical office said.
The number of children with Bulgarian mothers rose by 34 per cent to 4,200 babies last year, with those born to Romanian mothers increasing by 47 per cent to 8,150.