I don't necessarily subscribe to the "one year with no period" theory because I went a whole year without one and was told (without testing, by a doctor long since fired) that I would probably never have one again. While on vacation, I started a little over one year to the day of the last one. I then spent six months with highly irregular cycles before I quit altogether.
Interesting. Maybe I should fire my doc too. I just went a few days ago and he said (within the course of about 45 seconds, maybe in response to the way in which I phrased my questions): "Sure. Pregnancy after menopause is not that uncommon." "No, you don't worry about birth control, you won't get pregant." So, whatever.
I'm scheduled for a hormone test and have an appointment with a gynecologist. However, it seems clear that no matter what the results I won't have a definitive answer ... at least according to my web research. All the official medical websites described bleeding after menopause (defined as 12 months w/o period) as pathological and as attributable to a variety of problems from cancer to stress. However, in the vast majority of non-official, personal accounts (fora, blogs, etc) post-menopausal bleeding turns out to be just another period. "So, I went to my OB-GYN and they couldn't find anything wrong. Sux, though." Or, something to that effect. Even more interesting and, frankly, scary, are personal accounts of women actually getting unexpectedly pregnant 2,3, even 7 years after menopause has been *officially* declared.
So, I suppose I'll be using contraceptives until I'm 75. Sigh.