Higher asthma and allergy rates for first born babies
I do agree with the study conducted in the Isle of Wight in the United Kingdom pertaining to the risk the first born baby will have. If you wanna know why, just read this article.
ScienceDaily (May 21, 2008)
First-born children are at higher risk of developing asthma and allergy because of different conditions they experience in the uterus, according to new research from the Isle of Wight in the United Kingdom, which will be presented at the American Thoracic Society's 2008 International Conference in Toronto on May 21.
In order to determine whether the higher risk of asthma and allergy in first-born children is the result of a prenatal process of post-natal factors, researchers investigated whether birth order affected several immune markers that are set at birth, including a variation in the DNA of the IL-13 gene, which is linked to allergic development. Read full article here.