By Laurie Barclay
From Medscape Medical News
March 5, 2010 — Asthma severity during pregnancy is similar to severity in the previous year if women continue to take their prescribed medication but is more severe if they discontinue it, according to the results of a study reported in the March issue of Obstetrics & Gynecology.
"Early investigators suggested a rule of thirds: in one third of women, asthma improves during pregnancy; in one third, asthma becomes worse; and in one third it remains the same," write Kathleen Belanger, PhD, from Yale University School of Public Health in New Haven, Connecticut, and colleagues. "However, assessment of improvement has often been subjective, and exacerbations have been measured by hospitalizations and emergency department visits. No studies have used the more common clinical endpoints of symptoms and medication use to assess exacerbation during pregnancy."
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