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03 August 2009

Seafood eases pregnancy blues

Eating omega-3-rich seafood may be a mood-lifter for women who are feeling depressed during pregnancy, suggests a study of British women.

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Eating omega-3-rich seafood may be a mood-lifter for women who are feeling depressed during pregnancy, suggests a study of British women.

In the study, Dr Jean Golding, at the University of Bristol, and colleagues found an association between a low omega-3 fatty acid intake from seafood and an increased risk of high levels of depressive symptoms during pregnancy.

They report the finding in the latest issue of the journal Epidemiology.

The researchers studied 9,960 pregnant women. At 32 weeks of pregnancy, the women completed a questionnaire that included questions about mood and the amount of seafood they ate weekly during 1991 and 1992 - a period when seafood was the main source of omega-3 fatty acids in Britain.

Lowers depression by 50%
Compared with pregnant women who ate 3 or more servings of seafood per week - the equivalent of more than 1.5gr of omega-3 fatty acids - those who ate no seafood were about 50% more likely to report symptoms of depression at 32 weeks of pregnancy, the researchers found.

In this comparison, "we have assumed that omega-3 is the factor involved," Golding noted in an email correspondence with Reuters Health. However, vitamin D and iodine in fish may also minimise symptoms of depression, she and her colleagues note in their report.

The association between low seafood intake and greater symptoms of depression remained strong even when Golding's team accounted for a variety of factors that might influence the results.

Depression hurts mom, baby
Depression during pregnancy is harmful for both mother and child, Golding and colleagues point out in their report. And while common in western countries, depression appears to be virtually absent in countries where people eat a lot of fish.

The researchers call for further investigation into ties between seafood intake and depression in pregnancy, particularly in light of recommendations for pregnant women to limit some seafood consumption due to its mercury content.

"It is possible," they note, "that limiting intake in accordance with this advice could increase the risk of maternal depressive symptoms during pregnancy." - (Joene Hendry/Reuters Health, August 2009)

SOURCE: Epidemiology, July 2009

 
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