Sorry if I wasn't more clear. Based on the CA program 5dogs refered to above, the OB hemorrhage is "staged" by levels. Level 1 (least serious to level 3 (most serious). OB estimates blood loss by weighing pads, etc soaked with blood as a more accurate method then by just "eyeballing it". Once a certain level is measured, the patient is "staged", BB is notified, and based on that, we provide the appropriate products.