Risk of cerebral bleeding from arteriovenous malformations in pregnancy: the Sheffield experience.

Data were obtained from 191 women with cerebral arteriovenous malformations (AVMs) referred for stereotactic radiosurgery with the Leksell Gamma Unit in Sheffield. The risk of cerebral bleeding from arteriovenous malformations during pregnancy was examined and related to the different trimesters of pregnancy in these women. Some tentative guidelines are suggested for advising women with AVMs, who become pregnant.