The document discusses the overuse of the diagnosis "anemia in pregnancy" and stresses that the cause of any anemia with a hemoglobin level less than 10.5g/dl in pregnancy must be investigated and appropriately diagnosed, such as iron deficiency anemia, folate or B12 deficiency anemia, or thalassemia. It provides guidance on selectively investigating for common and treatable causes of anemia like iron deficiency, which can be confirmed by low MCV, MCHC, and MCH with low serum ferritin, and thalassemia, which may be indicated by a family history, low MCH even with normal hemoglobin, normal or high RBC count, or MCV/R