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Eating omega-3 fatty acids found in seafood such as tuna,
herring, salmon and sardines might stave off depression in
pregnant women, both before and after childbirth.
The federal government has issued warnings to pregnant women
about eating fish due to their potentially harmful levels
of mercury, but government recommendations still allow eating
up to 12 ounces a week of a variety of species.
In the study, researchers analyzed 11,721 British women.
They found that women who consumed greater amounts of omega-3
fatty acids in seafood during the third trimester were less
likely to show signs of major depression during pregnancy
and for up to eight months after the birth.
Women with the highest intakes of omega-3, who consumed fish
two or three times a week, were half as likely to suffer from
depression as women with the lowest intakes.
According to researchers, the 12-ounce-a-week government
recommendation would allow for two servings of fish per week.
Salmon, catfish and scallops reportedly have very little mercury
and fish-oil supplements are supposed to be mercury free.
About 10 percent of pregnant women--13 percent to 15 percent
among new mothers--develop depression severe enough to interfere
with their functioning.
Although studies looking at the risk of antidepressant drugs
in pregnant and nursing women have showed low risk, there
have been few studies about long-term effects.
The current research shows a strong correlation between low
levels of omega-3 fatty acids and symptoms of depression,
researchers said. However, further studies are needed to prove
that boosting levels of fatty acids will fight depression.
Government warnings have urged pregnant women to avoid eating
shark, swordfish, king mackerel and tilefish because they
can contain high levels of mercury, which can damage the nervous
system of the fetus. Additionally, fish may also pose other
contamination risks. Researchers suggested that women follow
local recommendations in regard to eating fish.
Annual Meeting of the American
Psychiatric Association; San Francisco, CA May 20, 2003
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