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Pica in Pregnancy: New Ideas About an Old Condition

Pica in Pregnancy: New Ideas About an Old Condition Pica, the purposive consumption of nonfood substances, is a millennia-old nutritional enigma. Its worldwide ubiquity, prevalence among pregnant women and children, and association with both positive and negative health outcomes, especially micronutrient deficiencies, underscore the importance of understanding this behavior. Multiple proposed etiologies of pica are reviewed, including cultural expectations, psychological stress, hunger, dyspepsia, micronutrient deficiencies (Fe, Zn, and Ca), and protection against toxins and pathogens. Currently available data, although limited, best support the protection hypothesis as a cause of most types of pica, although some evidence suggests that pagophagy (ice consumption) may occur during iron deficiency. It is possible that the binding capacity of pica substances explains the association with micronutrient deficiencies; earth, starch, etc. may render micronutrients in ingesta unavailable for absorption. Increased research efforts are warranted and must be hypothesis driven, interdisciplinary, and permit the testing of multiple causal inferences. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Nutrition Annual Reviews

Pica in Pregnancy: New Ideas About an Old Condition

Annual Review of Nutrition , Volume 30 – Aug 21, 2010

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References (94)

Publisher
Annual Reviews
Copyright
Copyright © 2010 by Annual Reviews. All rights reserved
ISSN
0199-9885
eISSN
1545-4312
DOI
10.1146/annurev.nutr.012809.104713
pmid
20420523
Publisher site
See Article on Publisher Site

Abstract

Pica, the purposive consumption of nonfood substances, is a millennia-old nutritional enigma. Its worldwide ubiquity, prevalence among pregnant women and children, and association with both positive and negative health outcomes, especially micronutrient deficiencies, underscore the importance of understanding this behavior. Multiple proposed etiologies of pica are reviewed, including cultural expectations, psychological stress, hunger, dyspepsia, micronutrient deficiencies (Fe, Zn, and Ca), and protection against toxins and pathogens. Currently available data, although limited, best support the protection hypothesis as a cause of most types of pica, although some evidence suggests that pagophagy (ice consumption) may occur during iron deficiency. It is possible that the binding capacity of pica substances explains the association with micronutrient deficiencies; earth, starch, etc. may render micronutrients in ingesta unavailable for absorption. Increased research efforts are warranted and must be hypothesis driven, interdisciplinary, and permit the testing of multiple causal inferences.

Journal

Annual Review of NutritionAnnual Reviews

Published: Aug 21, 2010

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