Causes of premature birth

It's not always possible to explain the causes of preterm birth and why it happens. There are risk factors for being born early, such as infection, placental problems or genetic problems, but in many cases the cause is unknown.

Most preterm babies arrive early without warning. However, some pregnancies are known to be at risk of ending in preterm birth.

We still have a lot to learn about premature birth so it's not always possible to explain the causes and why it happens. There are maternal and baby risk factors for being born early, such as infection, placental problems or genetic problems for example, but in many cases the cause is unknown. 

This is partly why prevention of premature birth is still in need of extensive research - without knowing the causes, a treatment is difficult. Tommy's invests more than £400,000 annually into prematurity research.

The following are all risk factors for premature birth.

Read more about premature birth

Last reviewed on April 1st, 2017. Next review date April 1st, 2020.

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Comments

  • By Margaret Carragher (not verified) on 7 Mar 2019 - 22:04

    My youngest daughter now 14yrs old was born at 24 weeks weighing 1lb, she came home from hospital after 11 weeks with no help or anything for her breathing and a scar on her septum where the cpap mask made a hole, her weight being 4lb 2oz, she contacted the rsv virus when she was a year old and spent her 2nd Christmas in hospital, when she was 2yr6m, she swallowed a penny that got lodged in her windpipe and had to go to theatre to have it removed under general anaesthetic, when she was 4 she was hit on the back of her head with a brick and was taken to hospital to have the wound glued and when she was 7 she was hit by a car!, despite the accidents she progressed through nursery school and then primary school pretty good with no major health issues, since starting High School her health seems to be deteriorating, right now she is on the most asthmatic medicine she could possibly be, she has chronic rhinitis, an altered breathing pattern and is waiting for an appointment to be tested for the condition Paradoxical Vocal Cord Dysfunction (PVCD), her breathing has gotten so bad that she needs a lift-pass at High School because she can't cope with the stairs between 3 floor and gets very shortof breath,

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