I was taking Effexor xr 150 mg and I became pregnant. I immediately stopped use. I later found out my baby would probably not make it at birth. Well, I gave birth and like they said he had birth defects and the cause was unknown. His bones did not develop properly and his chest was too small for his lings to grow. All of his bones were not formed correctly and they said for some reason when he was conceived the cell that forms bones just did not form. Could effexor xr be the reason? I am still searching for reasons my child did not survive.