The United States' lack of regulation has made it a magnet for the growing global eugenics market
The Chinese want boys, and the Canadians want girls. If they have enough money, they come to the United States to choose the sex of their babies. Well-off foreign couples are getting around laws banning sex selection in their home countries by coming to American soil _ where it's legal _ for medical procedures that can give them the boy, or girl, they want. - Houston Chronicle
The procedure in question - called preimplantation genetic diagnosis - is used to screen a batch of fertilized eggs. A doctor implants only embryos of the wanted sex. What happens to the unwanted embryos? The client decides whether they will be frozen, donated for research or destroyed.

