So I love to read the Daily Mail (I'll admit it) and they featured a story about women that had delivered babies and had no idea they were pregnant. Can you imagine? Apparently one in 600 births happen to women that weren't aware they were pregnant!
The story is here.

Re: Story about women that didn't know they were pg
I didn't know there was a show about this! (I don't have cable and don't watch TV)
Companion Cube- you're right- I cannot imagine feeling a baby coming out and not expecting it. I can imagine how you'd be in TOTAL shock.
Kris- I have no idea - I know that people do have spotting all the way through sometimes so they might think they were getting a period, but wouldn't you think you'd be able to feel the baby kick once it got old enough? Is that a feeling that's able to be misunderstood as something else?
Harper Oksana, born on her due date, January 20, 2011, and the love of my life
I was so obsessed I totally DVR'ed this show. The experts said some babies are not very active and some women don't have any pg symptoms. Some of the women are on the pill for the whole time, some women were on depo-provera and got pg. I dunno. Still seems nuts to me. Especially the women who had prior children!!! I guess it's possible though.
One woman on the show said she thought it was gas. Also, when a woman has an anterior placenta, the baby kicks against the placenta and not the belly. I had one with DD and I didn't feel her move until around 21 weeks I think, and it was very subtle. Friends would tell me who their baby would wake them up at night they were so active, and I never got it!