I am pregnant mum. I travel lots. When should I stop flying oversea?

For most airlines around the world, they will allow boarding for pregnant women up to 36 weeks (uncomplicated single pregnancies) and up to 32 weeks (uncomplicated multiple pregnancies) to board. Once you reach 28 weeks of pregnancy, you will require a medical certificate signed by your gynae stating that it is safe for you to board (dated within 10 days of outbound travel). The second trimester is the safest period to fly. In the first trimester, the risk of miscarriage is very high so it might be tough if you're overseas and suffer a miscarriage. The first trimester is also when morning sickness really hits you hard. In the third trimester, your belly will be heavier and some women suffer from backaches. Also not the best period to fly. https://www.singaporeair.com/en_UK/travel-information/expectant-mothers/