Women who consumed 200 milligrams or more of caffeine each day (about two cups of regular coffee or five 12-ounce cans of caffeinated soda) had twice the miscarriage risk as those who didn't have any, according to a new study by Kaiser Permanente in the American Journal of Obstetrics and Gynecology.
How Stress Causes Miscarriage. June 5, 2003 -- Stress has long been suspected as a possible cause of miscarriage, with several studies indicating an increased risk among women reporting high levels of emotional or physical turmoil in their early months of pregnancy or just before conception.Jun 5, 2003