The Leiden variant of factor V is not a defficiency, indeed the factor
is more effecttive at clotting.
Too effective.
THere is still some doubt over what the significance of Leiden V is and
although it has been suggested that this genetic test should be applied
to all women before starting the combined contraceptive pill* there is
a dearth of evidence showing that it ould save trouble.
In Exeter the test is not purchased.
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* sometimes curously abbreviated COCP as though something other than
oral was likely, or it came as other than Pills
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