"Hormones and other chemicals wreak havoc on the uterus" due to stress, as reported in 2003 in this peer-reviewed study:<ref>http://www.webmd.com/infertility-and-reproduction/news/20030605/how-stress-causes-miscarriage</ref> | "Hormones and other chemicals wreak havoc on the uterus" due to stress, as reported in 2003 in this peer-reviewed study:<ref>http://www.webmd.com/infertility-and-reproduction/news/20030605/how-stress-causes-miscarriage</ref> |