This cross-sectional study was aimed to investigate the factors associated with bipolar disorder in pregnant female, including sociodemographic parameters, social support, social conflict, suicidal idea and sleep.

A total of 84 pregnant female were recruited. They filled out self-completing questionnaires on sociodemographic factors, obstetric history, depressive symptoms and bipolarity. Depressive symptoms were assessed using the Korean version of the Edinburgh Postnatal Depression Scale (EPDS). Bipolarity was assessed using the Korean version of the Mood Disorder Questionnaire (K-MDQ).

Nineteen participants (22.6%) had positive K-MDQ scores, suggesting the present of bipolarity. Positive EPDS group had twenty subjects (25%) who had depressive symptoms. The diathesis of bipolar disorder was associated with marital dissatisfaction, social conflict, depression and sleep. The multiple logistic regression analysis revealed that the only poor sleep was a risk of bipolarity.

Pregnant female with bipolarity were more depressed and sleep problems than those without bipolarity. The results showed that the most important factor of influencing bipolarity was sleep.