There is no such definition for the severity of APH. It is usually seen that the amount of blood loss is underestimated and the amount of blood coming from the introitus might not represent the total blood loss. Therefore, it is important to check the signs of clinical shock while estimating blood loss. The presence of fetal compromise or fetal demise is a crucial indicator of volume depletion.
Question: Estimating blood loss can tell the severity of APH? Yes/No