Treatment of perinatal delusional disorder: a case report.

This article is a report on a complicated case of delusional disorder in pregnancy and lactation, and effective multidisciplinary treatment. Few reports in the literature concern delusional disorder in pregnancy, or regard olanzapine's safety in pregnancy and lactation. A gravid woman in her third trimester merited twin diagnoses of delusional disorder and borderline personality disorder, and was successfully treated with olanzapine and psychotherapy during pregnancy and lactation. Her infant was large for gestational age (LGA) and had Erb's palsy, which resolved, and remained healthy at six months, with continued breastfeeding. Her delusional beliefs did not recur, nor did she have postpartum depression or psychosis.