Increased risk of developing asthma by age of 3 after caesarean
Key points
- A new study supports previous findings that children delivered by caesarean section have an increased risk of developing asthma.
- “It is unlikely that a caesarean delivery itself would cause an increased risk of asthma, rather that children delivered this way may have an underlying vulnerability,” said Maria Magnus, a researcher at the Department of Chronic Diseases at the Norwegian Institute of Public Health.
- Delivery by caesarean section and early childhood respiratory symptoms and disorders: the Norwegian Mother and Child Cohort Study.
- The study from the Norwegian Mother and Child Cohort Study (MoBa) suggests that children delivered by caesarean section have an increased risk of asthma at the age of three.
A new study supports previous findings that children delivered by caesarean section have an increased risk of developing asthma.
The study from the Norwegian Mother and Child Cohort Study (MoBa) suggests that children delivered by caesarean section have an increased risk of asthma at the age of three. This was particularly seen among children without a hereditary tendency to asthma and allergies.
Data from more than 37 000 participants in the MoBa study were used to study the relationship between delivery method and the development of lower respiratory tract infections, wheezing and asthma in the first three years of life. Children born by planned or emergency caesarean section were compared with those born vaginally.
The results indicate that children born by caesarean section have a slightly elevated risk for asthma at three years, but have no increased risk of frequent lower respiratory tract infections or wheezing. The increased risk of asthma among children delivered by caesarean section was higher among children of mothers without allergies.
Unlikely caused by birth method
“It is unlikely that a caesarean delivery itself would cause an increased risk of asthma, rather that children delivered this way may have an underlying vulnerability,” said Maria Magnus, a researcher at the Department of Chronic Diseases at the Norwegian Institute of Public Health. Magnus is the primary author of the article published in the American Journal of Epidemiology.
Children delivered by caesarean section may have an increased risk of asthma due to an altered bacterial flora in the intestine that affects their immune system development, or because children born this way often have an increased risk of serious respiratory problems during the first weeks of life.
Reference
Delivery by caesarean section and early childhood respiratory symptoms and disorders: the Norwegian Mother and Child Cohort Study. Magnus MC, Håberg SE, Stigum H, Nafstad P, London SJ, Vangen S, Nystad W. Am J Epidemiol. 2011 Dec 1;174(11):1275-85.doi: 10.1093/aje/kwr242.
#$##
Norwegian Institute of Public Health
Written and revised by
Andrey Nailor, M.D.
Our doctors write and review articles for accuracy and keep them up to date.
health.am provides general information, not medical advice. Always consult a qualified health professional about your own health.
Explore health topics
More in this topic
Lungs, Asthma & Allergies →NewsEarly daycare may not lower asthma risk
Contrary to what some previous studies have suggested, children who enter daycare at an early age may not have a reduced risk of allergies and asthma later on, researchers reported Tuesday. In a study of more than 3,600…
10 September 2009
NewsNew Asthma Predictors Needed to Determine Future Risk in Certain Patients
Screening tests used to predict asthma activity in patients may have little tracking success when applied to people with persistent disease who are adhering to their health care regimens, UT Southwestern Medical Center…
2 September 2009
NewsLimiting allergy triggers may cut kids' asthma risk
Children who are genetically vulnerable to asthma may be less likely to develop the disease if their exposure to a variety of allergy triggers can be limited, a research review suggests. Children with a family history…
