With my first daughter, I told my Dr. that I was going to have my baby April 13th, even though I wasn't due until May 5th. I went into the hospital on April 13th. With #2 i predicted May 16th b/c I had a fieldtrip on Monday the 18th. Dr. said on the 13th, there was not going to have a baby that week, and sure enough, Thursday night I went into L&D and delivered on 5/15!!!! My family gets a kick out of how persistent I am with when I'll deliver. i have no idea... I am just really, really hopeful my entire pregnancy and it's worked out my way.