How likely will my child have bipolar, because i'm bipolar?

Possibly: Twin, adoption, and family history studies have demonstrated a 4 - 6 fold increased risk in first degree relatives of parents and siblings with bipolar disorder.

Nature- Nurture: Controlling other variables would lessen the likelihood of becoming bipolar. These are: biological (health/nutrition), psychological (self-esteem/self-worth/temperament/anger control/coping skills), social (parenting skills/healthy environment/discipline/support system).

Stats: 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