Could you tell me what is the likelihood of my child getting bipolar disorder if i'm carrying the gene?

Risk: The risk of an individual developing bipolar disorder if a first degree relative has bipolar disorder is seven times greater then the general population risk of 1-3%.

The numbers are: 35% or so a child will have it if one parent has it 75% if chance child will have it both parents have it. As far as a parent having it: this is done by history taking and interview observation plus the psychiatrist needs to get some information from those who are around the adult often e.g. a family member for example aka Only a psych eval can produce a diagnosis, no clinical blood test yet.