Old wives tales? Or truth?

There's this woman in her 60s that I work with and she constantly is on me about reaching above my head and bending over to pick things up! She says that doing those motions will wrap the umbilical cord around my baby's neck. It frightens me, but I dont believe this is the true reason why. I have an appointment with my doctor on friday and plan to ask him. But PLEASE share your opinons/knowledge on this matter. She's starting to freak me out.