What is Factor V deficiency?
Factor V deficiency is a severe inherited disease mainly characterized by mild to severe bleeding symptoms. The age of onset is variable.
Factor V deficiency follows an autosomal recessive pattern of inheritance. A couple is at risk of having affected offspring only when both members are carriers of the disease. When both members are carriers, the risk of having an affected child is 1 out of every 4 children.
What is the next step if I’m a carrier of Factor V deficiency?
If you are found to be a carrier of Factor V deficiency, it is important that your partner be tested for the same genetic disorder.
What if my partner is not a carrier?
If your partner’s test for Factor V deficiency is negative, the chance to have an affected child is low. However there is currently no test able to detect all existing mutations, so there is always a residual risk that the person who has done the test is a carrier of other less frequent mutations.
What if both me and my partner are carriers of Factor V deficiency?
When both parents are carriers of Factor V deficiency, the probability of having a child with this disease is 25%.
We recommend that you discuss your results with your doctor or genetic counselor in order to know more about reproductive options.