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Tuesday, 09 April 2019 18:23

Stillbirth risk increased by almost three times when women sleep on their back during latter stages of pregnancy Featured

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Research spearheaded by a University of Huddersfield lecturer has shown that pregnant women can lower the risk of stillbirth by sleeping on their side and NOT on their back.

Now the finding forms part of official NHS guidance designed to bring about reductions in the number of babies who are stillborn in the UK – amounting to nine a day, or one in every 225 births.

Dr Tomasina Stacey is Reader of Midwifery Practice at the University. She carried out her doctoral research while based at Auckland University in New Zealand, investigating whether sleeping position was a factor in stillbirth. She concluded that the small proportion of pregnant women who sleep on their backs did run a higher risk, because the weight of the uterus can reduce blood flow to the baby.

Her findings from this initial exploratory study were described in an article published by the British Medical Journal. It was the first study to report maternal sleep-related practices as risk factors for stillbirth. It triggered further research, culminating in a large-scale international project that gathered data from New Zealand, the UK, Australia and the USA.

This study included 851 bereaved mothers and 2,257 women with ongoing pregnancy and has now resulted in a multi-authored article available in EClinicalMedicine, published by The Lancet.

The chief finding is that going to sleep lying on the back from 28 weeks of pregnancy increased the risk of stillbirth by 2.6 times. This heightened risk occurred regardless of the other known risk factors for stillbirth.

The UK charity Tommy’s, which funds research into miscarriage, stillbirth and premature birth, has included Dr Stacey’s findings about sleep position in its advice to pregnant women. And now the NHS has incorporated them in its Saving Babies’ Lives care bundle – a dossier of advice issued as part of a push to halve the rate of stillbirths in the UK.

The care bundle states: “In later pregnancy (after 28 weeks), it is safer to go to sleep on your side than on your back”. It advises practitioners to “encourage women to settle on their side when they go to sleep or have a day-time nap, rather than on their back. A woman who wakes up on her back shouldn’t worry, but should settle to sleep again her side”.

Sleeping position remains an important strand of Dr Stacey’s research. It originated when she and a team at the University of Auckland – including her PhD supervisor Professor Lesley McCowan – were investigating the relatively high rates of stillbirth in New Zealand.

“We decided to look at a range of modifiable risk factors and this was one of them,” said Dr Stacey.

“The next phase is to ensure that there is consistent advice from healthcare professionals and we will be looking to see if there are ways of helping to support women to sleep in the side position.

“Only a small proportion of women will be affected,” continued Dr Stacey. “But the studies that we did following the first findings suggested that women were quite happy to change their going to sleep position if it was better for their babies.”


 


Full bibliographic information


An Individual Participant Data Meta-analysis of Maternal Going-to-Sleep Position, Interactions with Fetal Vulnerability, and the Risk of Late Stillbirth

Publication: Science Direct - EClinicalMedicine, published by The Lancet.

Source: The University of Huddersfield

Read 107 times Last modified on Wednesday, 10 April 2019 08:01

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