A new baby usually brings infinite joy to a family, but the pregnancy itself can sometimes be quite difficult for a mother-to-be. Elizabeth Fitelson, M.D., the director of the women's program at Columbia University, explained how pregnancy was once automatically perceived as being a time for "emotional well-being" for a woman, as she was assumed to be overjoyed to be having a child. "Unfortunately, that's not the case and has never really been the case, and now we have data that actually shows that pregnancy is not protected against mental illness," Fitelson told HuffPost Live's Alyona Minkovski on Wednesday.