Not knowing you're pregnant

Can a woman possibly go through nine months of pregnancy without knowing she's pregnant? I've heard a few stories of women delivering a baby and claiming they had no idea they were pregnant. Personally, I don't think it's possible. Thoughts?

Moms Expertise
    I always wondering that too? I mean they claim that did not have any symptoms? but what about the growing belly??
    still confuses me.
      I read about a woman who had two children. She went to the hospital with abdominal pain. While waiting, her water broke. As it turns out, she wasn't married, so I have to wonder if she hid the pregnancy from him so that he wouldn't leave. After all, it's a little too late to deny the baby when it's born.
      About Maria
      Birth: December 31
      On since: Oct 30, 2013