The FFA says:
Cerebral Venous Thrombosis
Approximately 70% of people who have venous thrombosis, have a clear predisposing factor, such as factor 5 Leiden deficiency, Protein C or S deficiency, anti-thrombin 3 deficiency, or, PGM deficiency, trauma, infection or dehydration, anovulents, pregnancy and Methylenedioxymetamphetamine (Ecstasy). If there is no evidence of an ongoing or recurrent risk, if there has been no evidence of epilepsy and if the person has no significant sequelae from the thrombosis, they can be considered medically fit two years after the event.
Cerebral Venous Thrombosis
Approximately 70% of people who have venous thrombosis, have a clear predisposing factor, such as factor 5 Leiden deficiency, Protein C or S deficiency, anti-thrombin 3 deficiency, or, PGM deficiency, trauma, infection or dehydration, anovulents, pregnancy and Methylenedioxymetamphetamine (Ecstasy). If there is no evidence of an ongoing or recurrent risk, if there has been no evidence of epilepsy and if the person has no significant sequelae from the thrombosis, they can be considered medically fit two years after the event.
Thanks.