Firstborn children more likely to contract allergies
Recent research conducted by an MSU professor discovered that firstborn children are more likely to suffer from asthma and other allergies.Wilfried Karmaus, an associate professor of epidemiology, found that firstborns have higher levels of cord blood immunoglobulin, a protein determined to be a risk factor for asthma and other allergies, such as hay fever.Karmaus said changes in the mothers womb after the birth of a first child are reasons for the difference.The immune system is changed to a different state, he said.