Factor V Leiden is the most common hereditary blood coagualtion disorder in the United States. It is present in 5% of the Caucasian population and 1.2% of the African American population.(more...)

Other sites

http://en.wikipedia.org/wiki/Factor_V_Leiden

http://www.cmaj.ca/cgi/content/full/167/1/48

http://ghr.nlm.nih.gov/condition=factorvleidenthrombophilia

http://www.circ.ahajournals.org/cgi/content/full/107/15/e94

http://circ.ahajournals.org/cgi/reprint/107/15/e94.pdf

I have 1 cell of FVL mutation. According to my Dr, I need to be aware of this as it pertains to: flights or car trips over 3 hrs, or prolonged periods of sitting. Now during all meetings (no matter how long) I try not to cross my legs at the knees and also constantly flex and rotate my legs. Easy to do and I feel like I am continuing to 'fight' any future clotting by these small, and simple preventative measures.