Does menstruation affect seizures?

Epilepsy.com. Some seizures may be hormonal dependent and yes some may experience more frequency of seizures during menstrual periods.Yes. Approximately half the women of childbearing age who have epilepsy report an increase in seizures around the time of their monthly menstrual period. Seizures occurring predominantly around the time of menstruation are referred to as catamenial epilepsy. http://www.epilepsy.
Sometimes. Many things can affect seizures, even those that are well-controlled. Even "little" things like sleep deprivation or a urinary tract infection can set off seizures that were controlled. Hormonal fluctuations with menstruation is another.