Some research associates use of citalopram, fluoxetine and sertraline with a rare but serious newborn lung problem (persistent pulmonary hypertension of the newborn, or PPHN) when taken during the last half of pregnancy, as well as heart defects affecting the septum the wall of tissue that separates the left side of the heart from the right side of the heart.

CNN: Antidepressants: Safe during pregnancy?