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Restless legs syndrome occurs in 26% of pregnancies, peaking in the 7th and 8th months but sharply declining around the time of delivery, an Italian study of more than 600 women revealed.
Although an association between restless legs syndrome (RLS) and pregnancy was first reported in 1940, a study by Mauro Manconi, M.D., of Vita-Salute University in Milan and associates is the first large epidemiologic study to explore the connection (Neurology 2004;63:1065-9).
The researchers concluded that pregnancy is an "important risk factor" for RLS and hypothesized that a pregnancy-related nocturnal increase in prolactin and associated reduction in dopaminergic activity may be to blame for cases that arise in pregnancy or are worsened by it.
A total of 606 women were interviewed within 2 days after parturition by one of two neurologists certified in sleep medicine about their medical and family histories, pregnancy histories, iron and folate therapy, sleep habits, and presence of sleep disorders. Follow-up interviews were conducted at 1, 3, and 6 months after delivery with 161 women who met international diagnostic criteria for RLS, including:
* Desire to move the limbs, usually associated with paresthesias/dysesthesias.
* Motor restlessness.
* Worsening of symptoms at rest, with at least partial and temporary relief by activity.
Source: HighBeam Research, Restless legs syndrome common in pregnancy.(Obstetrics)