Generally. No. You are likely to get pregnant within the 3-5 day window around your ovulation date, after which your period normally commences about 2 weeks later. This is a genaral timeline, every woman differs. That being said if you are ovulating and then starting your period right afterwards this is refered to as having an insufficient luteal phase. Most women with this situation have very difficult times getting pregnant, it can be a sign of hormone defficiencies. Now it has been known to happen that women will ovulate right after their period during which time you could become pregnant, but you won't get pregnant "on your period" even the last day. Keep in mind that sperm can survive for up to 5 days in the womb so if you ovulate within 5 days of your last period you could become pregnant even if you last had intercourse on the last day of your previous period. Kinda longwinded and confusing but hope it helps.
at 2:27 AM on Sep. 12, 2010