Canadian Wes Branch (pictured) holding his newborn daughter. He and his girlfriend Ada Guan were on an Air Canada flight from Calgary to Tokyo on Mother鈥檚 Day when Ms Guan, who had no idea she was pregnant, gave birth. Screengrab from Youtube by The Straits Times/Asia 黑料社 Network
An extra infant passenger appeared on an Air Canada flight from Calgary to Tokyo on Mother鈥檚 Day.
Canadian Ada Guan was two hours into the flight on May 10 when she had severe stomach cramps. A few hours later, the 23-year-old, who had no idea she was pregnant, gave birth to a baby girl.
Ms Guan and her boyfriend Wes Branch live in Victoria, Canada, and were going to Japan, Canadian media reported.
During the flight, as contractions began, she thought she had a bad stomach virus. She was moved to business class and put on a drip.
In an interview with Canada鈥檚 Global 黑料社, Mr Branch said: 鈥淪he told me 鈥楽omething fell out of me鈥� and I lifted up her pants and I see a head, and then I heard 鈥榃aah!鈥�. And I鈥檓 like 鈥極h my god, I think we have a kid鈥�.鈥�
Mr Branch, who works for a moving company, also told CBC 黑料社 he 鈥減assed out鈥� briefly due to the shock.
Luckily, there were three doctors aboard their flight, and one volunteered after the crew appealed for medical aid.
The plane arrived at Narita Airport in Tokyo 30 minutes ahead of schedule after it was given priority to land.
The couple said that Ms Guan did a pregnancy test a few months ago, but it was negative. She thought she had just put on a bit of weight.
鈥淗er belly wasn鈥檛 even big,鈥� new father Mr Branch said. They named the baby Chloe.
Air Canada sent out a congratulatory tweet after the plane landed in Japan.
Surprise births are rare, but doctors say they do occur.