Periods during pregnancy?

I've heard several women here voice that they had their "period" during their pregnancy. For those of you that have, what made you realize you were pregnant?
Answers:

Any women here that CAN'T hold children?

You do not get a 'length' when pregnant. This is impossible as you do not ovulate during pregnancy. These women may have experienced bleeding or spotting throughout pregnancy. There is also implantation bleeding which occur when the embryo attaches itself onto the uterine wall. All of these kinds of bleeding should be much lighter than a regular interval would be but if your periods are irregular or remarkably light anyway it may be difficult to spot the difference. Sudden changes within your menstrual cycle should warrant a visit to the doc.

What are the probability?

This girl I knew said she have her "period" during her pregnancy and she didn't find out until she started showing.

Help Please!! Kind of gross?

no, i heard you do not draw from periods while pregnant....unless something else happen thats not supposed to happen!

One of the orifice of my vagina is bigger than the other and a little swollen.oblige what is this?

this hasnt happened to me but i be pregnant and at about a week back my period i started notice changes hips hurting, boob sensitivity, tiredness, electric drain, i just feel different all around but to get sure you either are or arent save some pregnancy tests handy to check yourself if your body starts shifting you can get them at Family Dollar stores for 2-3 dollars and they work merely as good as the expensive ones