Highlights
In this nationwide Swedish cohort of 1,785,088 primiparous women followed for up to 50 years, adverse pregnancy outcomes were associated with a higher maternal risk of nontraumatic subarachnoid hemorrhage.
The strongest associations were seen after placental abruption and hypertensive disorders of pregnancy, with elevated risks also observed after gestational diabetes, preterm birth, and small-for-gestational-age delivery.
