Featured Research

from universities, journals, and other organizations

Bariatric surgery can lead to premature birth

Date:
November 12, 2013
Source:
Karolinska Institutet
Summary:
Babies born of women who have undergone bariatric (weight-loss) surgery are more likely to be premature and to be small for gestational age, according to a large registry study carried out in Sweden. The researchers believe that these pregnancies should be considered risk pregnancies and that prenatal care should monitor them extra carefully.

Babies born of women who have undergone bariatric (weight-loss) surgery are more likely to be premature and to be small for gestational age, according to a large registry study carried out at Karolinska Institutet in Sweden and published in the BMJ. The researchers believe that these pregnancies should be considered risk pregnancies and that prenatal care should monitor them extra carefully.

The number of bariatric operations has increased dramatically in recent years. Most of these operations are performed on women, and as a result the number of babies born to women with a history of bariatric surgery is also increasing. Researchers at Karolinska Institutet have now examined how the operation affects pregnancy. The study, which is the most extensive ever done in the field, was based on data from the Swedish Medical Birth Register and the Patient Register.

The study compared over 2,500 babies born between 1992 and 2009 of women who had previously undergone bariatric surgery with 12,500 babies born to mothers who had not. The pregnancies were matched individually, so that the mothers' BMI, age, educational background, smoking habits, and previous births were comparable in both groups.

The researchers found that infants of women with bariatric surgery history have lower weights at delivery. 5.2 per cent of them were small for gestational age and were at least two standard deviations below the normal as opposed to only 3.0 per cent in the control group. Moreover, 4.2 per cent of the babies of mothers with bariatric surgery history were large for gestational age, compared to 7.3 per cent of the control group, and more were born prematurely: 9.7 per cent before the 37th week, compared with 6.1 per cent of the control group. The researchers also found no difference regarding stillbirth or neonatal death (within the first 27 days) between the two groups.

"Mothers with the same BMI gave birth to babies of varying weights depending on whether or not they had undergone bariatric surgery, so there is some kind of association between the two," says Dr Olof Stephansson, obstetrician and Associate Professor at the Clinical Epidemiology Unit at Karolinska Institutet. "The mechanism behind how surgery influences fetal growth we don't yet know, but we do know that people who have bariatric surgery are at increased risk of micronutrient deficiencies."

The researchers think that women with bariatric surgery history should be considered a risk group when pregnant, which means that they should be paid particularly close prenatal attention, and have extra ultrasound to check fetal growth, for example, or be given special dietary supplement recommendations. The researchers also point out that bariatric surgery has numerous benefits for mothers, such as lowering the risk of diabetes, cardiovascular disease, cancer and stroke. Furthermore, untreated obesity is a known risk factor for both mother and baby during pregnancy and childbirth.


Story Source:

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


Journal Reference:

  1. Nathalie Roos, Martin Neovius, Sven Cnattingius, Ylva Trolle Lagerros, Maria Sääf, Fredrik Granath, and Olof Stephansson. Perinatal outcomes after bariatric surgery: nationwide population-based matched cohort study. British Medical Journal, November 2013

Cite This Page:

Karolinska Institutet. "Bariatric surgery can lead to premature birth." ScienceDaily. ScienceDaily, 12 November 2013. <www.sciencedaily.com/releases/2013/11/131112200457.htm>.
Karolinska Institutet. (2013, November 12). Bariatric surgery can lead to premature birth. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2013/11/131112200457.htm
Karolinska Institutet. "Bariatric surgery can lead to premature birth." ScienceDaily. www.sciencedaily.com/releases/2013/11/131112200457.htm (accessed July 31, 2014).

Share This




More Health & Medicine News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

House Republicans Vote to Sue Obama Over Healthcare Law

House Republicans Vote to Sue Obama Over Healthcare Law

Reuters - US Online Video (July 31, 2014) — The Republican-led House of Representatives votes to sue President Obama, accusing him of overstepping his executive authority in making changes to the Affordable Care Act. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Despite Health Questions, E-Cigs Are Beneficial: Study

Despite Health Questions, E-Cigs Are Beneficial: Study

Newsy (July 31, 2014) — Citing 81 previous studies, new research out of London suggests the benefits of smoking e-cigarettes instead of regular ones outweighs the risks. Video provided by Newsy
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) — Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Health Insurers' Profits Slide

Health Insurers' Profits Slide

Reuters - Business Video Online (July 30, 2014) — Obamacare-related costs were said to be behind the profit plunge at Wellpoint and Humana, but Wellpoint sees the new exchanges boosting its earnings for the full year. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins