Differences by race/ethnicity have been noted, with higher ICH incidence rates in blacks and in Hispanics than whites for both women Increased Prevalence of SAH in Women: Risks Related to Cerebral Aneurysms There has been significant debate about the potential cause of the increased risk of SAH in women. Autopsy and angi- ographic studies have documented a higher prevalence of cerebral aneurysms in women,49 as well as a higher risk of These findings are in agreement with results of a recent study from the Nationwide Inpatient Sample, which claimed that more than twice as many women as men were discharged with both ruptured and unruptured cerebral aneu- There is also a difference in the distribution of aneu- rysm locations in women versus men, and this may convey a higher hemorrhagic risk, especially with greater prevalence of aneurysms at the posterior communicating artery.52 Other studies have suggested similar trigger factors for aneurysm rupture in men and women.53 There is also no convincing evi- dence of increased risk of aneurysmal SAH in pregnancy or and before age 50 years, aneurysmal SAH is more common in men.55 A population-based case-control study showed that the risk of SAH was lower in women with first pregnancy after 23 years of age and in those who had ever used hormone therapy (HT).56 The literature certainly confirmed a higher incidence of SAH and a higher prevalence of cerebral aneurysms in women, but not necessarily a higher risk for rupture of aneurysms with similar characteristics. 