Hematocrit is the percentage of red blood cells in the blood.

A decrease in hematocrit indicates blood loss or anemia. Postpartum hemorrhage (PPH) is defined as blood loss of ≥ 500–1000 ml within 24 hours after delivery. PPH can cause a significant drop in hematocrit and hemoglobin levels, which can lead to hypovolemia and shock. A normal hematocrit range for women is 36% to 48%.

Therefore, a hematocrit level below 30% may indicate PPH.

Choice B. Hematocrit > 30% is wrong because it does not indicate a decrease in red blood cell count or blood loss. A hematocrit level above 30% may be normal or indicate dehydration, polycythemia, or other conditions.

Choice C. Hematocrit < 40% is wrong because it is within the normal range for women and does not indicate a significant decrease in red blood cell count or blood loss.

Choice D. Hematocrit > 40% is wrong because it does not indicate a decrease in red blood cell count or blood loss.

A hematocrit level above 40% may be normal or indicate dehydration