Been flying pretty much every 3 to 4 weeks for work since I got preggies, the first time, on the 9th week, i spotted as I was pushing the cart from the airport to the taxi stand. But was really tired that trip.
After that been careful and checked with Dr who monitors to see how the baby's heartbeat has been and if everything is ok, and since then, I have flown from Hk to KL, Singapore ( twice), Tokyo and China. So far, 6 months and plan to fly 3 times more before delivery. Fingers cross.