There are, in fact, several ways that you can be pregnant and still have your period. If your conception occurs closely with your menstruation, you will still have a cycle.
- What if You Got Your Period But Still Think Your Pregnant? – http://answers.ask.com/Health/Reproductive/what_if_you_got_your_period_but_still_think_your_pregnant
- how to get pregnant when you have irregular periods or even regular menstrual cycles? – http://www.ehow.com/how_2262187_periods-even-regular-menstrual-cycles.html
- Why you feeling nauseous all day could you be pregnant even if you have had a period? – http://wiki.answers.com/Q/Why_you_feeling_nauseous_all_day_could_you_be_pregnant_even_if_you_have_had_a_period
- What are the chances of getting pregnant if you had sex the evening you started your period? – http://wiki.answers.com/Q/What_are_the_chances_of_getting_pregnant_if_you_had_sex_the_evening_you_started_your_period