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New Study links C-Section to Childhood Asthma

Studies show a link between children delivered via caesarian section (C-section) and the development of childhood asthma.  Children born via C-section have a higher risk of developing asthma by the age of three, even to non-smoking mothers and mothers who do not have asthma.  The results suggest that the rising rate of C-section deliveries may be another risk factor that contributes to childhood asthma, along with other known risk factors such as parental smoking and air pollution. Asthma affects one in four children around the world.

To a certain degree, asthma is hereditary. There is also some environmental factors play a role in the development of asthma as well.  One theory is said that children born via C-section may miss exposure to important immune challenges compared to children born naturally.  These early immune challenges may teach the immune system how to properly respond to later immune challenges. 

 “In the current study, Norwegian researchers examined asthma risk in more than 37,000 children. Information on the method of delivery was obtained from Norwegian medical registries. Mothers entered the study in early pregnancy and completed a questionnaire in which they reported important demographic and lifestyle information. They filled out questionnaires about the children’s health several times after birth and before the children were three years old. They were asked whether the child suffered from wheezing, asthma or recurring respiratory tract infections. Researchers compared the occurrence of these in C-section births with those from natural deliveries.” (

According to the American Academy of Allergy Asthma and Immunology:
• Approximately 34.1 million Americans have been diagnosed with asthma by a health professional during their lifetime.
• An estimated 300 million people worldwide suffer from asthma, with 250,000 annual deaths attributed to the disease.
• Workplace conditions, such as exposure to fumes, gases or dust, are responsible for 11% of asthma cases worldwide.
• About 70% of asthmatics also have allergies.
• It is estimated that the number of people with asthma will grow by more than 100 million by 2025.
• Asthma is the third-ranking cause of hospitalization among children under 15.
• An average of one out of every 10 school-aged children has asthma.

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