There was a case on the local news recently where a man called 911 because his wife was having severe abdominal pains. While he was on the phone with the dispatcher, he suddenly exclaimed, "!@# It's a baby!" Apparently, this was the 2nd time she'd gone through a pregnancy w/out realizing it until giving birth. It didn't sound like they were stupid people, rather for some reason she doesn't always experience or exhibit the normal signs. (Although, I must admit, if it were me, after the first time, I'd invest in a pregnancy test every month or two, just for safety's sake.) They seemed happy enough about a 4th addition to their family, though.