Continuity mistake: In the scene where Paltrow awakens the next morning after the birth you see her both her arms past her elbows and there is no sign of an injection wound on her right arm where Lange gave her the morphine shot. Yet later in the kitchen during the pivotal confrontation scene with Lange when Paltrow pulls up her sleeve to show her right arm as she explains how Lange tried to kill her the night before, there is a large large black and blue mark wound at the injection site on her right arm.
Martha Baring: Now, why can't you just be sensible. Leave your life and your work and your friends and move in here with a controlling old woman, and a big ranch of horse shit.
Helen: You're not that old.