21+ Anemia Range Levels US . Anemia is defined as a decrease in the quantity of circulating red blood cells (rbc), represented by a reduction in hemoglobin concentration (hb), hematocrit (hct), or rbc count. Symptoms include feeling cold and anemia occurs when there are not enough healthy red blood cells to carry oxygen to your body's organs. Cord Blood Hemoglobin Reference Range from static.cambridge.org The body does not have enough red blood cells and is unable to deliver enough oxygen around the body. Anemia is defined as a decrease in the quantity of circulating red blood cells (rbc), represented by a reduction in hemoglobin concentration (hb), hematocrit (hct), or rbc count. There are several anemia types. 12.3 to 15.3 g/dl in women. From fatigue to arrhythmia, anemia causes a wide range of symptoms. Anemia is a condition in which the hemoglobin concentration is lower than n...