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. "Some people spend $50,000 to $70,000 for a BMW car and think nothing of it, but this is a life that's going to be with us forever," said Robert, an Australian who asked that his last...