I wasn't suggesting anyone who works during pregnancy is unusual or that pregnancy is an illness,I think going about as normal is absolutely the way forward. I was merely pointing out that long haul flights are known to muck about with your menstrual cycle, so therefore, despite being told flying long haul was safe, I will always wonder if doing so didn't cause my otherwise perfectly healthy pregnancy to end very suddenly at 15 weeks. If you google it, it seems to a be a very commonly asked question, so clearly it's happened to other people as well, which it may well have done anyway, but it's one of those 'never know' situations.