Mothers in British Columbia are having a baby boom, but it's the United States that has to deliver, and that has some proud Canadians blasting their highly touted government healthcare system.

"I'm a born-bred Canadian, as well as my daughter and son, and I'm ashamed," Jill Irvine told FOX News. Irvine's daughter, Carri Ash, is one of at least 40 mothers or their babies who've been airlifted from British Columbia to the U.S. this year because Canadian hospitals didn't have room for the preemies in their neonatal units.

"It's a big number and bigger than the previous capacity of the system to deal with it," said Adrian Dix, a British Columbia legislator, told FOXNews.com. "So when that happens, you can't have a waiting list for a mother having the baby. She just has the baby."

"The Canadian healthcare system has used the United States as a safety net for years," said Michael Turner of the Cato Institute. "In fact, overall about one out of every seven Canadian physicians sends someone to the United States every year for treatment."