This study defines the incidence of ischemic and hemorrhagic cerebrovascular disorders among pregnant women in Rochester, Minn, from 1955 through 1979. Of the 26,099 live births during this period, only one instance of cerebral infarction (5.1 cerebral infarctions per 100,000 person-years of observation) and no instances of transient ischemic attack or intracranial hemorrhage were identified in pregnant women. These data suggest that the occurrence rates of cerebrovascular events during pregnancy may be much lower than has previously been reported.
Wiebers DO, Whisnant JP. The Incidence of Stroke Among Pregnant Women in Rochester, Minn, 1955 Through 1979. JAMA. 1985;254(21):3055-3057. doi:10.1001/jama.1985.03360210071032