Men are from Mars, women are from Venus. This is as true for the nature of stroke as it is for attitudes toward relationships. Yet, there has never before been a guideline dedicated to stroke risk and prevention in women. The new 86 page document, issued today by the American Heart Association/American Stroke Association addresses four risk factors distinct to women, such as pregnancy, oral contraceptives, menopause, and hormone replacement, as well as four factors that affect women disproportionately such as atrial fibrillation and migraine with aura. The guidelines, for instance, include specific recommendations for low-dose aspirin and calcium regimens for pregnant women with hypertension.