Migraine is an episodic headache disorder that may be preceded by a prodrome and initiated by an aura. Migraine occurs in 4% of children, 6% of men, and 18% of women. Migraine in women is influenced by hormonal changes throughout the life cycle: menarche, menstruation, oral contraceptive use, pregnancy, menopause, and hormonal replacement therapy. Migraine can occur for the first time during pregnancy; preexisting migraine may worsen, particularly during the first trimester; or the patient may become headache free in later pregnancy. Some women have no change in their headache during pregnancy.<sup>57Uknis A., Silberstein S.D. Review article: Migraine and pregnancy Headache 1991 ;  31 : 372 [cross-ref]

Haga clic aquí para ir a la sección de Referencias</sup> The real incidence of migraine in pregnancy is uncertain, and most reported cases have been of migraine with aura or prolonged aura.

In the past, migraine headaches were known as either classic migraine or common migraine, based on the presence or absence of an aura.<sup>53Silberstein S.D., Saper J. Migraine: Diagnosis and treatment Wolff's Headache and Other Head Pain New York: Oxford University Press (1993).  96

Haga clic aquí para ir a la sección de Referencias</sup>Common migraine is now called migraine without aura. Classic migraine is now called migraine with aura . Migraine with or without aura may be associated with premonitory phenomena that develop hours to days before the headache attack. Examples include hyperactivity or hypoactivity, depression, irritability, difficulty in concentrating, and food cravings, especially for chocolate.<sup>53Silberstein S.D., Saper J. Migraine: Diagnosis and treatment Wolff's Headache and Other Head Pain New York: Oxford University Press (1993).  96

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