Electroconvulsive therapy (ECT) offers a treatment option for mood disorders during pregnancy. We retrospectively examined 12 pregnant patients who were treated with ECT for their mood disorders. The mean +/- SD age of the patients was 28.1 +/- 4.8 years. The mean +/- SD number of ECTs performed was 9.8 +/- 4.5. The mean T SD Clinical Global Impression score was decreased from 6 to 2.6 +/- 0.7 with ECT. No significant adverse events were observed other than early delivery in one patient and pes ekinovarus deformity in a newborn that was most probably not related to ECT causally. Electroconvulsive therapy seems to be an effective and safe treatment option in pregnant patients with mood disorders.