A 35-year-old woman from rural India presents with fatigue, dyspnea on exertion, and pallor. On examination, she has koilonychia and glossitis. Her hemoglobin is 7.2 g/dL with microcytic, hypochromic indices. What is the most common cause of iron deficiency anemia in women of reproductive age in India?

Explanation

## Most Common Cause of Iron Deficiency Anemia in Women of Reproductive Age in India **Key Point:** In India, nutritional deficiency due to inadequate dietary intake is the **most common cause** of iron deficiency anemia (IDA) in women of reproductive age, not menorrhagia. This is well-established in Park's Textbook of Preventive and Social Medicine and WHO epidemiological data for South Asia. **Clinical Pearl:** India bears the highest burden of anemia globally. The National Family Health Survey (NFHS-5) reports that ~57% of women aged 15–49 years in India are anemic, with nutritional iron deficiency being the predominant etiology—driven by low dietary iron intake (predominantly non-heme iron from plant-based diets), poor bioavailability, and increased physiological demands (menstruation, pregnancy, lactation). **High-Yield:** The hierarchy of causes of IDA differs by population context: - **India / developing countries (women of reproductive age):** Nutritional deficiency (inadequate dietary intake) — **most common** - **Developed countries (women of reproductive age):** Menorrhagia is relatively more prominent - **Postmenopausal women / men:** GI blood loss (malignancy, peptic ulcer, hemorrhoids) - **Children:** Nutritional deficiency (inadequate intake or malabsorption) ### Why Nutritional Deficiency Is the Answer In rural India specifically: 1. Diets are predominantly cereal-based with low bioavailable (non-heme) iron 2. Inhibitors of iron absorption (phytates, tannins) are abundant in staple foods 3. Animal-source foods (heme iron) are consumed infrequently 4. Increased physiological demands from menstruation, repeated pregnancies, and lactation compound the deficit 5. This results in chronic, progressive iron store depletion → microcytic hypochromic anemia → tissue signs (koilonychia, glossitis) ### Why Menorrhagia (Option A) Is Incorrect as the "Most Common" in India While menorrhagia is an important cause of IDA and is the leading cause in developed-country settings, in the Indian subcontinent context, dietary inadequacy is far more pervasive and epidemiologically dominant. Park (26th ed., Ch. 5) explicitly identifies nutritional deficiency as the primary cause of anemia in India. ### Differential Causes in This Patient | Cause | Prevalence in Indian Women (Reproductive Age) | Clinical Clue | |-------|-----------------------------------------------|---------------| | Nutritional deficiency | **~60–70%** | Low dietary iron, rural setting, plant-based diet | | Menorrhagia | ~20–30% | History of heavy/prolonged menses | | Malabsorption (celiac) | ~5–10% | Diarrhea, weight loss, GI symptoms | | Hemolysis | <5% | Jaundice, dark urine, elevated reticulocyte count | **Note:** Hemolysis (Option D) causes normocytic or macrocytic anemia with elevated reticulocytes and indirect bilirubin — it does NOT cause microcytic hypochromic anemia, making it clearly incorrect here. [cite: Park 26e Ch 5; NFHS-5 India Report; WHO Global Anaemia Estimates]