Being an expectant mother doesn't mean you are barred from but you will need to prove just how far along you are.

According to the , flying is not deemed harmful to you or your unborn child, but any health issues or complications should be discussed with your community midwife or doctor before you board a flight. In general, some airlines clamp down on pregnant women travelling when they are over the 37 week mark as there is a higher chance of going into natural labour. But pregnant women do need to provide an extra document if they are looking to fly later on into their .

Around 28 weeks, if you have a holiday or trip planned where you need to fly, the airline may ask for a letter from a GP or midwife confirming a due date and that you are not at risk of any complications. But, it's not always free and this service may demand a fee - and take a little while to arrive.

With guidance being slightly different for each airline, we've rounded up four of the UK's most popular air-operators and what they expect from a pregnant passenger. easyJet, , and each have specific regulations requiring certain passengers to present an additional document upon . While the regulations between airlines are similar, there are some differences.

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Ryanair allows passengers at up to 28 weeks pregnant to fly without providing a medical document for support. Once a pregnancy reaches 28 weeks, they are required to carry a completed ‘fit to fly’ letter from their doctor or midwife. The ‘fit to fly’ letter can be downloaded from the airline website and must be presented to cabin crew upon boarding. The letter must be dated within two weeks of the booked flight.

If you have a single pregnancy and are flying Ryanair, travel is not permitted beyond the end of the 36th week of your pregnancy. Additionally, for pregnancy with multiples, a ‘fit to fly’ letter is required between 28-32 weeks, and travel is not permitted beyond the end of the 32nd week of pregnancy.

TUI Airways is similar, requiring pregnant passengers exceeding their 28th week to advise customer services and present a completed fit to fly letter from their doctor or midwife. The form does not need to be uploaded in advance, but may be asked for at the time of boarding and should be a maximum of eight days old at the time of departure. No TUI passengers whose pregnancy exceeds 37 weeks will be permitted to fly.

Contrastingly, easyJet does not require pregnant passengers to present a fitness to fly form at any point in their pregnancy. However, the airline does not permit expectant mothers to travel beyond the 35th week of their single pregnancy. This prohibition is brought forward to the 32nd week for pregnancies concerning multiples.

British Airways is stricter, requiring expectant mothers to have a pregnancy form or an official letter, completed and stamped by your doctor or midwife for travel throughout your pregnancy. Again, the document should be dated as close to your travel date as possible and cover the entire length of your trip.

Those pregnant with a single baby will not be permitted to fly after the end of their 36th week and those carrying multiples will not be permitted to fly after the end of their 32nd week. The fitness to fly form is quite standard between all airlines, prompting doctors or midwives to confirm the specifics of the patient's pregnancy as well as any known medical conditions and concerns.