That is untrue. Hair does not know if it's been cut - other than the root in your scalp, hair is dead. You may
notice it more when it grows back because the end is blunt and not tapered. It's an old wive's tale that shaving makes hair grow back faster and thicker.
hairremoval.about.com/od/shaving/a/shaving
101.htm
To the original poster: it should go away soon after you give birth. In the meantime, you can shave it if it's really bothering you.