Arcadia city officials are cracking down on "maternity tourism" boarding houses by dedicating a full-time police detective to investigate the issue. Maternity or birth tourism is a phenomenon in which women, often from China, pay a handsome fee to have their babies in the United States, so the children can be citizens. While that is not illegal, at least five establishments have been shut down for violations, such as unlawfully operating boarding house businesses in residential zones.