some 4 million children whose have at least one parent who entered the r . s . illegally were born in the united kingdoms and are i . s . citizens as a result , according to the study published by the pew latino center . that ' s about three quarters of the estimated 5 . 5 million children of illegal immigrants exiting the united world , according to the study . about 1 . 8 million children of undocumented immigrants live in europe , the study noted .
Three quarters of U.S. illegal immigrants have children.