Halving the risk of preterm birth for twins

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International research involving the University of Adelaide has found that the risk of preterm birth could be halved for a specific group of “super high-risk” twin pregnancies.

The results could help to save babies’ lives throughout the world and prevent serious health complications after birth.

The study, involving researchers from the University of Adelaide’s Robinson Research Institute, reviewed all of the previous large studies conducted into the use of progestogen hormones, which have been trialled over the past 10 years to help prevent preterm birth in twins. In total, 13 studies covering more than 3700 women and 7500 babies were reviewed.

The results, published in BJOG: An International Journal of Obstetrics and Gynaecology, show that an important discovery had been missed in each of those previous studies.

“Until now the research has demonstrated that there has been no benefit from the use of progestogen hormones in preventing preterm birth for women with a twin pregnancy,” says co-author Professor Ben Mol from the University’s Robinson Research Institute.

“Thanks to this international review, we can now see that there is a very specific benefit to one group of high-risk pregnancies: women who have a short cervix, who are pregnant with twins.

“Twin pregnancies are very much at risk of preterm birth, with half of these pregnancies delivering before 37 weeks’ gestation. For women with a short cervix who are also pregnant with twins, this is what I would call a ‘super high risk’ category for adverse outcomes, either for infant death or for serious health problems after birth.

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“We found that by using progestogen hormones, there was a 50% reduction in risk of preterm birth for this group of pregnancies. That’s a very significant result, and one that we hope will help to save lives and prevent future heartache for couples who are trying to have children,” he says.

Professor Mol says preterm birth remains the biggest problem in modern Western obstetrics.

“Anything that can help to prevent preterm birth will be of interest to clinicians and families throughout the world, and that’s why this finding is important. While it does not help to reduce risk in all twin pregnancies, it does help to significantly reduce poor outcomes for those twin pregnancies in a very high risk group,” he says.

“This work also highlights the need for further collaboration between researchers and countries.”

(Source: The University of Adelaide, BJOG: An International Journal of Obstetrics and Gynaecology)

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Date Created: September 25, 2014