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Prevalences of nutritional deficiencies related to erythropoiesis according to the pre-pregnancy BMI. (a) Anaemia; (b) iron deficiency (ID) anaemia (IDA); (c) ID; (d) folate depletion and (e) vitamin (Vit) B12 deficiency for underweight (UW), normal weight (NW), overweight (OW) and obese (OB) women
