Surrogacy agencies in China and the United States are catering to wealthy Chinese who want a baby outside the country's restrictive family planning policies, who are unable to conceive themselves, or who are seeking U.S. citizenship for their children.
Emigration as a family is another draw - U.S. citizens may apply for Green Cards for their parents when they turn 21.
While there is no data on the total number of Chinese who have sought or used U.S. surrogates, agencies in both countries say demand has risen rapidly in the last two years.
U.S. fertility clinics and surrogacy agencies are creating Chinese-language websites and hiring Mandarin speakers.
Boston-based Circle Surrogacy has handled half a dozen Chinese surrogacy cases over the last five years, said president John Weltman.
"I would be surprised if you called me back in four months and that number hadn't doubled," he said. "That's the level of interest...