Article: Study links women's asthma attacks, estrogen levels.(Originated from Knight-Ridder Newspapers)

Women can add asthma attacks to the growing list of mysterious ways their bodies respond to estrogen.

A study led by Philadelphia researchers has found that women are most likely to suffer severe asthma attacks during the week around the start of their menstrual period, when estrogen declines sharply in their blood.

The study, which followed 182 women for a year, appears in today's issue of the Archives of Internal Medicine.

It builds on the researchers' previous findings that women are three times as likely as men to be hospitalized for treatment of asthma, a disease that afflicts an estimated 10 million Americans.

Exactly what role estrogen ...

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