‘High flyers, delayed arrival’ birth theory

Could the act of flying at high altitude somehow prevent high-risk women going into premature labour?

That’s one explanation being touted as to why the WA Royal Flying Doctor Service has never experienced a single birth during flight, despite transferring hundreds of women deemed at imminent risk of preterm birth.

A review of their most recent 500 transfers to Perth from rural WA has shown a significant correlation between the height the plane flies, and the time to delivery on arrival.

Women who flew at over 14,000 feet (4267m) on