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By MARTI STELLING, HEALTH REPORTER
Published: 23:30 BST, 18 June 2026 | Updated: 07:41 BST, 19 June 2026
Bending forwards and prolonged walking at work during early pregnancy may raise the risk of miscarriage, a study suggests.
A large Danish study of more than 475,000 working women, covering over 800,000 pregnancies, examined whethe r physical activity at work in early pregnancy - defined as the first three months - is linked to miscarriage risk.
Miscarriage is relatively common but most cases are caused by chromosomal or developmental issues with the embryo rather than a mother’s everyday movements.
However, some lifestyle and environmental factors may play a role.
The research, published in Occupational & Environmental Medicine, found that each additional hour spent bending forward per day was associated with a 36 per cent higher risk of miscarriage.
The more often people bent forwards, the stronger the link appeared to be.
Researchers stress that this refers to an extra hour per eight-hour working day across early pregnancy, rather than a one-off instance.
They suggest physical strain could potentially affect blood flow to the placenta or hormonal regulation, although this remains uncertain.
Bending forwards and prolonged walking at work during early pregnancy may raise the risk of miscarriage, a study suggests
The study also identified a weaker link with walking at work, with each additional hour associated with an 18 per cent higher risk, though this pattern was less consistent.
Because the study is observational, it cannot establish cause and effect.
Researchers were also unable to fully account for other known risk factors, including smoking, alcohol consumption, caffeine intake, or underlying health conditions such as PCOS or thyroid disorders.
Experts emphasise that the findings do not mean normal movement during pregnancy is unsafe.
Instead, they likely reflect prolonged or repeated workplace postures, rather than everyday physical activity, and prolonged forward bending is relatively uncommon.
They also note that many miscarriages are due to genetic causes and are unlikely to be influenced by these behaviours, and that previous prospective studies have not consistently found similar links.
In the UK, an estimated 250,000 pregnancies end in miscarriage each year, with most occurring within the first 12 to 13 weeks.
The findings highlight a potential occupational risk in early pregnancy but researchers say further studies are needed before any changes to workplace guidance can be justified.
What is a miscarriage?
A miscarriage is the loss of a pregnancy before 24 weeks.
The main symptom of miscarriage is usually vaginal bleeding that happens before 24 weeks of pregnancy.
Signs of bleeding in pregnancy may include:
spots of pink, red or brown blood on your underwear or toilet paper (spotting)
larger areas of pink, red or brown blood that may need a period pad (light bleeding)
red blood that soaks through a pad (heavy bleeding)
Other symptoms of a miscarriage can include:
pain and cramping in your lower tummy
pink, grey or white lumps coming out of your vagina, which may look or feel stringy
fluid suddenly coming out of your vagina
Sometimes you may have no symptoms and you'll only find out you've had a miscarriage at a pregnancy scan. This is called a missed miscarriage.
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