These risk factors were implicated in 54.9% and 19.7% of antepartum and intrapartum stillbirths, respectiely, among African American women, and in a respectie 46.6% and 11.9% among white women.

• 对于非裔美国人，这些危险因素在产前及产时死胎中所占比例分别是54.；9%25和19