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Increased risk of birth asphyxia in babies born to overweight and obese women

Date:
May 20, 2014
Source:
PLOS
Summary:
The risk of experiencing an oxygen deficit at birth (birth asphyxia) increases for babies born to women who are overweight or obese, according to a new study.

The risk of experiencing an oxygen deficit at birth (birth asphyxia) increases for babies born to women who are overweight or obese, according to a study by Swedish and US researchers published in this week's PLOS Medicine.

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These findings are important given the high prevalence of overweight and obesity worldwide, and suggest that preventing women of reproductive age from becoming overweight or obese is important to the health of their children.

The authors, led by Dr. Martina Persson from the Swedish medical university Karolinska Institutet, reached these conclusions by using information from the Swedish medical birth registry (a database including nearly all the births occurring in Sweden since 1973) for all births (of single babies) that took place between 1992 to 2010 -- comprising over 1.7 million births.

They found that although mothers with normal weight gave birth to the majority of infants with the lowest Apgar scores (a measure of oxygen deficit at birth), the proportion of low Apgar scores was greater in babies of overweight and obese mothers. Overall, the authors found that the rates of low Apgar scores increased with maternal Body Mass Index (BMI): overweight (BMI 25.0-29.9) was associated with a 55% increased risk of low Apgar scores at 5 minutes; obesity grade I (BMI 30-34.9) and grade II (BMI 35.0-39.9) was associated with a 2-fold increased risk; and obesity grade ΙII (BMI ≥ 40.0) was associated with a more than 3-fold increase in risk.

Although this study is limited by the lack of data on the effects of clinical interventions and neonatal resuscitation efforts that may have been performed at the time of birth, these findings suggest that early detection of perinatal asphyxia is particularly relevant among infants of overweight and obese women although more studies are necessary to confirm these results in other populations.

The authors say:" this population-based cohort study from Sweden clearly demonstrates increased risks of perinatal asphyxia-related complications with increasing maternal [Body Mass Index] in infants delivered at term."

They continue: "Prevention of overweight and obesity in women of reproductive age is an important strategy to improve perinatal health."


Story Source:

The above story is based on materials provided by PLOS. Note: Materials may be edited for content and length.


Journal Reference:

  1. Martina Persson, Stefan Johansson, Eduardo Villamor, Sven Cnattingius. Maternal Overweight and Obesity and Risks of Severe Birth-Asphyxia-Related Complications in Term Infants: A Population-Based Cohort Study in Sweden. PLoS Medicine, 2014; 11 (5): e1001648 DOI: 10.1371/journal.pmed.1001648

Cite This Page:

PLOS. "Increased risk of birth asphyxia in babies born to overweight and obese women." ScienceDaily. ScienceDaily, 20 May 2014. <www.sciencedaily.com/releases/2014/05/140520184753.htm>.
PLOS. (2014, May 20). Increased risk of birth asphyxia in babies born to overweight and obese women. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2014/05/140520184753.htm
PLOS. "Increased risk of birth asphyxia in babies born to overweight and obese women." ScienceDaily. www.sciencedaily.com/releases/2014/05/140520184753.htm (accessed October 25, 2014).

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