Yes, it seems to be that a depressed mother can have a negative effect on the mental health of the baby.
www.sciencedaily.com/releases/2011/11/111110142352.htmI questioned that myself as I fell in major depression after my ex udBPD husband left me for someone else a few days after my youngest child was born. At the time, 27 years ago, I had no clue that I suffered depression ( and PTSD). Let alone that I knew about borderline PD.
It took me years to heal and all the children have suffered by having all of a sudden a mother who was completely different. My youngest is ud BPD and looking back, he had the signs from very early on. Although I think they need to have a gene to be vulnerable to develop it. Sad but true.I often feel guilty that my depression has triggered it, but also know that it just happened and I did not have a choice to be depressed or not. It's very, very sad.