I don't think I really believe in any of them, but my mom sure did drive me crazy with them when I was pregnant. Her biggest one was that a pregnant woman should never raise her arms up over her head...it will cause the cord to wrap around the baby's neck. She kept bugging me over and over again with this one so finally I had her come to a dr's appointment with me and I asked the dr about it and he said it was the silliest thing he had ever heard of, but surprisingly a lot of people ask about it. He said your arms are in no way going to affect what goes on with the cord.