Table 1.

International Headache Society classification of menstrual migraine

Pure menstrual migraine without aura11
Diagnostic criteria
A.	Attacks, in a menstruating woman, fulfilling criteria for migraine without aura and criterion (B) below
B.	Documented and prospectively recorded evidence over at least three consecutive cycles has confirmed that attacks occur exclusively on day 1±2 (ie, days −2 to +3) of menstruation in at least two out of three menstrual cycles and at no other times of the cycle
Menstrually related migraine without aura11
Diagnostic criteria
A.	Attacks, in a menstruating woman, fulfilling criteria for migraine without aura and criterion B below
B.	Documented and prospectively recorded evidence over at least three consecutive cycles has confirmed that attacks occur on day 1±2 (ie, days −2 to +3) of menstruation in at least two out of three menstrual cycles and additionally, at other times of the cycle

Notes: For the purposes of ICHD-3 beta, menstruation is considered to be endometrial bleeding resulting from either the normal menstrual cycle or from the withdrawal of exogenous progestogens, as in the use of combined oral contraceptives or cyclical hormone replacement therapy. The first day of menstruation is day 1, and the preceding day is day −1; there is no day 0.

Abbreviation: ICHD, International Headache Society Classification of Headache Disorders.