Fig. 2. Three patterns of catamenial epilepsy. During normal, ovulatory cycles, both perimenstrual (C1) and periovulatory (C2) patterns can occur in isolation or together. During inadequate luteral phase cycles, the (C3) pattern can occur with increased seizures during the entire second half of the cycle.

Day 1 is the first day of menstrual flow and ovulation usually occurs at Day 14 in normal cycles. Adapted from Herzog, A.G. [30]