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Researchers: Exercise affects pregnancy

September 22, 2009 12:00:00 AM PDT
Researchers say exercise during pregnancy may decrease the chance of giving birth to a heavier baby.Researchers in Norway examined more than 35,000 pregnancies recorded in a Norwegian study.

Among those pregnancies, more than 4,000 were babies born excessively heavy, defined as being in the 90th percentile for weight.

Researchers found first-time mothers, who exercised at least three times a week during pregnancy, were less likely to have bigger babies.

The relationship between exercise and excessive birth weight was not as conclusive for women who had given birth previously.

The study appears in the October issue of the journal Obstetrics & Gynecology.

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