Scientifically, how does the baby benefit when childbirth is calm?

During the last few months of pregnancy, during labour and childbirth, there is an incredible amount of imprinting occurring for both the baby and the mother. The mother is not only providing nutrients for the baby, she is also providing information. She is preparing her baby for the environment into which he/she will arrive. If the mother is calm and confident during pregnancy and birth, then this is already preparing her baby to be a calm and confident human being. On the other hand if she is stressed and anxious the biochemical interaction during pregnancy labour and birth can set up a different perception for that baby about life. How it happens sets up a pattern, which can be repeated over and over again. (Lipton, B. 2005, The Biology of Belief, Mountain of Love/Elite Books, Santa Rosa, California.)