Anaemia

Anaemia means we have less circulating haemoglobin than is normal in the population. The normal values in adults are 13.5 to 17.5 grams per decilitre in males, and 11.5 to 15.5 in females. At birth the usual levels of haemoglobin are higher, 14 to 20 grams per decilitre, and they decline during the first year of life, usually because of dietary deficiency of iron. At three months the lower limit of normal is 9.5 grams per decilitre. Anaemia occurs either because we are losing blood, because the blood that we are making is in some way sub-standard or because we are destroying the blood cells. The different causes of anaemia produce other changes in the blood cells.
 
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