Featured Research

from universities, journals, and other organizations

Standing for long periods during pregnancy may curb fetal growth: But working up to 36 weeks has no adverse effect, study suggests

Date:
June 28, 2012
Source:
BMJ-British Medical Journal
Summary:
Standing for long periods during pregnancy may curb the growth of the developing fetus, suggests new research.

Standing for long periods during pregnancy may curb the growth of the developing fetus, suggests research published online in Occupational and Environmental Medicine.

Related Articles


Previous research has indicated that long working hours may increase the risk of birth defects, premature birth, stillbirth and low birth-weight.

The researchers assessed the fetal growth rates of 4680 mums to be from early pregnancy onwards between 2002 and 2006.

Midway through their pregnancy, the women were quizzed about their work conditions and the physical demands of their jobs, including whether these included lifting, long periods of standing or walking, night shifts and long working hours.

Around four out of 10 (38.5%) of the women spent a long time on their feet and 45.5% had to walk for long periods. Heavy lifting was part of the job for just 6%, while around 4% worked night shifts.

The development of their babies was regularly measured throughout pregnancy, using ultrasound, and then again at birth.

The results showed that physically demanding work and long working hours were not consistently associated with restrictions on overall size or birth-weight, or with premature birth.

And working up to 34 or 36 weeks of pregnancy had no adverse impact on fetal development.

But women who spent long periods on their feet during their pregnancy, in jobs such as sales, childcare, and teaching, had babies whose heads were an average of 1 cm (3%) smaller than average at birth, implying a slower growth rate.

Around half the women (47.5%) worked between 25 and 39 hours a week, while around one in four (23%) worked more than 40 hours a week.

And those who worked more than 40 hours a week had smaller babies than those who worked under 25 hours a week.

Babies born to these women had a head circumference that was 1 cm smaller and a weight that was between 148 and 198 g smaller, on average, than babies born to women working under 25 hours a week. These differences were apparent from the third trimester (last three months of pregnancy) onwards.

The authors comment that generally women who are working outside the home have fewer pregnancy complications, birth defects, and stillbirths than women who are unemployed, but that certain aspects of work may not be without risk.


Story Source:

The above story is based on materials provided by BMJ-British Medical Journal. Note: Materials may be edited for content and length.


Journal Reference:

  1. Claudia a Snijder, Teus Brand, Vincent Jaddoe, Albert Hofman, Johan P Mackenbach, Eric a P Steegers, Alex Burdorf. Physically demanding work, fetal growth and the risk of adverse birth outcomes. The Generation R Study. Occupational and Environmental Medicine, 2012 DOI: 10.1136/oemed-2011-100615

Cite This Page:

BMJ-British Medical Journal. "Standing for long periods during pregnancy may curb fetal growth: But working up to 36 weeks has no adverse effect, study suggests." ScienceDaily. ScienceDaily, 28 June 2012. <www.sciencedaily.com/releases/2012/06/120628131245.htm>.
BMJ-British Medical Journal. (2012, June 28). Standing for long periods during pregnancy may curb fetal growth: But working up to 36 weeks has no adverse effect, study suggests. ScienceDaily. Retrieved November 21, 2014 from www.sciencedaily.com/releases/2012/06/120628131245.htm
BMJ-British Medical Journal. "Standing for long periods during pregnancy may curb fetal growth: But working up to 36 weeks has no adverse effect, study suggests." ScienceDaily. www.sciencedaily.com/releases/2012/06/120628131245.htm (accessed November 21, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, November 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

WFP: Ebola Risks Heightened Among Women Throughout Africa

WFP: Ebola Risks Heightened Among Women Throughout Africa

AFP (Nov. 21, 2014) Having children has always been a frightening prospect in Sierra Leone, the world's most dangerous place to give birth, but Ebola has presented an alarming new threat for expectant mothers. Duration: 00:37 Video provided by AFP
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com
Milestone Birthdays Can Bring Existential Crisis, Study Says

Milestone Birthdays Can Bring Existential Crisis, Study Says

Newsy (Nov. 21, 2014) Researchers find that as people approach new decades in their lives they make bigger life decisions. Video provided by Newsy
Powered by NewsLook.com
Ebola: Life Without School in Guinea

Ebola: Life Without School in Guinea

AFP (Nov. 21, 2014) Following the closure of schools and universities in Guinea because of the Ebola virus, students look for temporary work or gather in makeshift classrooms to catch up on their syllabus. Duration: 02:14 Video provided by AFP
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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