15 to 25 percent March of Dimes Miscarriage 15 to 25 percent miscarriage miscarriage 80 percent of miscarriages occurring in the first trimester 80 per cent 15 to 25 percent miscarriage that happens all the time miscarriage a lot of people others Miscarriage 15 to 25 percent Miscarriage Causes, Symptoms, Rates, and More 15 to 25 percent