1. The document discusses the relationship between migraine and thrombofilia, specifically looking at the MTHFR C677T polymorphism which is associated with higher homocysteine levels and cardiovascular disease risk. 2. One study found the TT genotype was less common in migraine patients but conferred higher risk of ischemic stroke in those with migraine with aura. 3. A meta-analysis found conflicting data on the association between migraine and the C677T polymorphism with high heterogeneity between studies related to ethnicity.