Featured Research

from universities, journals, and other organizations

Pre-pregnancy overweight may program teen asthma symptoms

Date:
August 16, 2011
Source:
BMJ-British Medical Journal
Summary:
Moms who are overweight or obese when they become pregnant may be programming their children to have asthma -- like respiratory symptoms during adolescence, suggests new research.

Mums who are overweight or obese when they become pregnant may be programming their children to have asthma-like respiratory symptoms during adolescence, suggests research published online in the Journal of Epidemiology and Community Health.

The prevalence of children's asthma has risen substantially worldwide, since the 1970s, and up to 37% of teenagers may have asthma symptoms, making it one of the most common childhood long term conditions, say the authors.

The reasons for this increase are unclear, but environmental factors are likely to have a key role, they say, adding that the prevalence of overweight/obesity among women at the time they enter pregnancy has also increased dramatically over the past few decades.

In a bid to find out if there was any potential link between these factors, the research team assessed the respiratory health of just under 7,000 15 and 16 year olds, all of whom were born in northern Finland between July 1985 and June 1986.

Their mums had been questioned on their lifestyle, social background, and educational attainment when they were 12 weeks pregnant. Information had also been collected by midwives on the occasion of their first antenatal visit. This included height and weight before pregnancy and parental medical history.

One in 10 of the teens wheezed and one in five had wheezed at some point; similarly, 6% had asthma and one in 10 had had asthma at some point.

Several early life factors were significantly associated with subsequent respiratory symptoms, the findings showed.

These included extremes of birthweight; being brought up by a single parent; a genetic predisposition; and being a smoker or having a mum who smoked during pregnancy.

A mum's weight before she became pregnant also had a bearing on wheeze/asthma risk, and remained so, even after accounting for these other factors.

Teens whose mums had been seriously overweight or obese before they became pregnant were between 20% and 30% more likely to wheeze/have wheezed or have asthma currently or previously.

When a mother's weight was looked at by kilogram per height, the association with wheeze and asthma in adolescents became highly significant, amounting to an increased risk for every extra kilogram of weight of between 2.7% and 3.5%.

Teens whose mums were among the heaviest, were 47% more likely to have severe wheeze after taking account of factors likely to influence the results.

The authors point out that their findings do not show that pre-pregnancy obesity definitely causes respiratory symptoms among teenagers, but they point to other research showing links between maternal obesity and respiratory symptoms in infants and young children, as well as numerous complications during pregnancy.

They suggest that overweight may interfere with normal fetal development as a result of disrupted metabolic, hormonal, or ovarian activity.

Increasing weight is also linked to increasing levels of the hormone leptin, receptors for which are found in the lung of the developing fetus.


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. Swatee P Patel, Alina Rodriguez, Mark P Little, Paul Elliott, Juha Pekkanen, Anna-Liisa Hartikainen, Anneli Pouta, Jaana Laitinen, Terttu Harju, Dexter Canoy, Marjo-Riitta Jδrvelin. Associations between pre-pregnancy obesity and asthma symptoms in adolescents. J Epidemiol Community Health, 15 August 2011 DOI: 10.1136/jech.2011.133777

Cite This Page:

BMJ-British Medical Journal. "Pre-pregnancy overweight may program teen asthma symptoms." ScienceDaily. ScienceDaily, 16 August 2011. <www.sciencedaily.com/releases/2011/08/110815191416.htm>.
BMJ-British Medical Journal. (2011, August 16). Pre-pregnancy overweight may program teen asthma symptoms. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2011/08/110815191416.htm
BMJ-British Medical Journal. "Pre-pregnancy overweight may program teen asthma symptoms." ScienceDaily. www.sciencedaily.com/releases/2011/08/110815191416.htm (accessed October 21, 2014).

Share This



More Health & Medicine News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How Nigeria Beat Its Ebola Outbreak

How Nigeria Beat Its Ebola Outbreak

Newsy (Oct. 20, 2014) — The World Health Organization has declared Nigeria free of Ebola. Health experts credit a bit of luck and the government's initial response. Video provided by Newsy
Powered by NewsLook.com
Another Study Suggests Viagra Is Good For The Heart

Another Study Suggests Viagra Is Good For The Heart

Newsy (Oct. 20, 2014) — An ingredient in erectile-dysfunction medications such as Viagra could improve heart function. Perhaps not surprising, given Viagra's history. Video provided by Newsy
Powered by NewsLook.com
Ebola Worries End for Dozens on U.S. Watch Lists

Ebola Worries End for Dozens on U.S. Watch Lists

Reuters - US Online Video (Oct. 20, 2014) — Forty-three people who had contact with Thomas Eric Duncan, the first person diagnosed with Ebola in the U.S., were cleared overnight of twice-daily monitoring after 21 days of showing no symptoms. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
CDC Calls for New Ebola Safety Guidelines

CDC Calls for New Ebola Safety Guidelines

AP (Oct. 20, 2014) — Centers for Disease Control and Prevention Director Dr. Tom Frieden laid out new guidelines for health care workers when dealing with the deadly Ebola virus including new precautions when taking off personal protective equipment. (Oct. 20) Video provided by AP
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