If 10% to 20% of the placental surface is detached without distress to mother and fetus, this condition is classified as:

The classification of placental abruption is essential for assessing the severity and planning the appropriate management. When 10% to 20% of the placental surface is detached and there are no signs of maternal or fetal distress, it is classified as Grade 1, or mild.

This classification indicates that the detachment is relatively small and has not resulted in significant clinical problems, such as hemorrhage or compromised fetal well-being. In cases of mild abruption like this, close monitoring is typically sufficient, and immediate intervention may not be necessary unless symptoms change.

Understanding this classification helps clinicians determine the best path forward for both the mother and fetus, ensuring safety and minimizing risks associated with potential complications. Knowing that Grades 2, 3, and 4 represent increasing severity and complications emphasizes why Grade 1 is only associated with a limited detachment and the absence of distress.