Assessing Anemia in Pregnant Women: The Usefulness of the Mentzer Index

Anemia during pregnancy is a prevalent concern, with iron deficiency anemia (IDA) and thalassemia trait (TT) being two common causes. Differentiating between these conditions is crucial for effective management, as IDA requires iron supplementation, while TT does not. The Mentzer Index (MI) is a simple, cost-effective tool used to distinguish between IDA and TT by analyzing the mean corpuscular volume (MCV) and red blood cell (RBC) count. This review explores the usefulness of the Mentzer Index in assessing anemia in pregnant women, its clinical applications, benefits, and limitations in practice. The Mentzer Index provides a quick and efficient means of diagnosing anemia types by calculating the ratio of MCV to RBC. A value below 13 typically suggests thalassemia trait, while a higher value points to iron deficiency anemia. In pregnancy, where anemia is common due to increased iron demands, the Mentzer Index serves as an essential tool to guide treatment decisions. By helping clinicians avoid unnecessary iron supplementation in women with thalassemia, it reduces the risk of complications such as iron overload, thereby improving patient outcomes. Keywords: Anemia, Pregnant Women, Mentzer Index, Iron Deficiency, Thalassemia