According to WHO criteria, anaemia in pregnancy is defined as haemoglobin below:

• A 9 g/dL
• B 10 g/dL
• C 11 g/dL ✓
• D 12 g/dL

Explanation

The WHO defines anaemia in pregnancy as haemoglobin less than 11 g/dL, lower than the non-pregnant cutoff of 12 g/dL because of physiological haemodilution. Severity grading uses 7 to 10 g/dL as moderate and under 7 g/dL as severe. The 12 g/dL option applies to non-pregnant adult women, and the 10 g/dL figure corresponds to the moderate anaemia threshold, not the diagnostic cutoff.

Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.

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