Stress during pregnancy affects baby's immune system

Dr. Rosalind Wright of Harvard Medical School in Boston says there is “a growing body of evidence that links maternal stress such as that precipitated by financial problems or relationship issues to changes in children's developing immune systems, even during pregnancy,"

Wright and colleagues found mothers who were the most distressed during pregnancy were most likely to give birth to infants with higher levels of immunoglobulin E or IgE -- an immune system compound -- even though their mothers had only mild exposure to allergens during pregnancy.