I am relocating to New York next week from London, and will be flying to South Africa about four weeks later to visit my family. By the time I fly to South Africa I will be 20 weeks pregnant. The flight is 15 hours to Johannesburg and then another 2 hours to Cape Town. It has now come to my attention that pregnant women should preferably not fly long haul due to the risk of DVT. I am flying business class so will be able to stretch out. Can anyone please let me know whether they have flown long haul at four months and what, if any, effect it had on them and/or the baby? Many thanks!