Antimanic Drug Use in Pregnancy

Inclusion Criteria for Bipolar Subjects: * Age 18 or older * Pregnant at 20 weeks or more * Women must receive OB care * English-speaking * DSM-IV diagnosis of BP, any subtype Inclusion Criteria for non-Bipolar Control Subject: * Age 18 or older * Pregnant at 20 weeks or more * English-speaking * Women must receive OB care. * Women may have past or present subclinical Major Depressive Disorder according to the DSM-IV. Exclusion Criteria for all: * Women must have no Active Alcohol Abuse or Dependence, Active Abuse or Dependence of Opiates, Inhalants, Amphetamines including Ecstasy or LSD, Active IV Drug Abuse, or Methadone Maintenance. * Women must not take drugs in the FDA categories D or X. Additional Exclusion Criteria for Control Subjects: * Women must have no lifetime history of Bipolar Disorder or antimanic drug use.