"It looks like the heavier the woman, the higher the risk," said Dr. Sarah McDonald, associate professor in the Michael G. DeGroote School of Medicine's Department of Obstetrics and Gynecology. She led a meta-analysis of 84 studies comparing overweight and obese to normal weight women.
The analysis found overweight or obese women have a 30 per cent greater risk of induced preterm birth before 37 weeks and that risk climbs to 70 per cent for very obese women. (A full-term pregnancy is 40 weeks).
Overweight or obese women also had a higher risk of early preterm birth – before 32 or 33 weeks, again with higher risks in heavier women. The research appears in the latest issue of the British Medical Journal (BMJ).
"Preterm birth and low birth weight are leading predictors of neonatal morbidity and mortality and morbidity or illness through childhood," said McDonald, adding there are also implications for the child's family and the health care system.
She said it is not yet clear why there is a link between a mother's weight and preterm birth.
Overweight and obesity is now the most common pregnancy complication in many developed, and some developing countries. Statistics Canada reports 29 per cent of Canadian women are overweight and 23 per cent are obese.
Two-thirds of Hamilton area women who are pregnant are overweight or obese, according to local data. No similar provincial or national statistics are available.
McDonald said the popular view that a pregnant woman is eating for two is not true. "It's just not right. Typically, women should add about 300 calories a day – the equivalent of a large glass of milk and a piece of fruit - in the latter half of their pregnancy," she said.
Counselling women before they become pregnant on the potential risks to overweight and obesity using a multi-pronged approach is required, McDonald said.
"Family doctors, nurses, obstetricians, public health nurses, and dieticians are all important in delivering a consistent message. Women often make many positive lifestyle changes for their pregnancies to have healthier babies, so now we need to make sure that they are aware of these findings so they can optimize their weight before pregnancy."
The research was supported by a Canadian Institute of Health Research (CIHR) operating grant. McDonald is supported by a CIHR New Investigator Award.
Veronica McGuire | EurekAlert!
Reusable carbon nanotubes could be the water filter of the future, says RIT study
30.03.2017 | Rochester Institute of Technology
Pan-European study on “Smart Engineering”
30.03.2017 | IPH - Institut für Integrierte Produktion Hannover gGmbH
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
30.03.2017 | Health and Medicine
30.03.2017 | Health and Medicine
30.03.2017 | Medical Engineering