Mothers who suffer from high levels of stress and anxiety during their pregnancy might be more likely to have sickly babies. Researchers from Radboud University in the Netherlands asked 174 women in the last third of their pregnancies to fill out questionnaires about their stress and anxiety levels. They also measured their levels of cortisol - a hormone linked to stress - in their saliva. Even after controlling for other relevant factors, the researchers found that the variance in infant illness and antibiotic use was predicted by prenatal anxiety and stress: 10.7 percent for general illness, 9.3 percent for respiratory problems, 8.9 percent for skin conditions, and 7.6 percent for the use of antibiotics.
You can find out more about this research by clicking on the link in the title of this post.