Hello I wonder if anyone could give me some advice about flying on a small plane which is an unpressurised plane. I've been waiting to start trying for a baby as i suffer from chronic hypertension and had to change my medicine. Finally when i got my blood pressure settled, i got pregnant before flying on holiday in a few days. I am 3 weeks pregnant. Initially i never had any doubts about flying but then i've realised i'm flying on a small plane which is unpressurised and some people's advice is not to fly when pregnant in an unpressurised plane. I've spoken to the air company who said that they would be flying at a maximum of 10,000 feet but the flight is only 1 hour and will not be at 10,000 feet all the time. Can anyone help me put my worries to rest? Not sure if the advice to not fly is for people who are in 3rd trimester but i understand being in the early weeks, you're vulnerable to miscarriage and wonder if this would make me at risk. Any advice much appreciated.