Is it possible to get pregnant when having intercourse during the menstruation phase of a period?
Yes — [and in fact] depending on the length of your cycle some women may [find it] impossible … to get pregnant without intercourse during menstruation. That said — this is by far NOT the norm. It is rare, but true. [RAH – The reason behind this phenomenon is that some women have a pre-ovulatory phase (after period ends but before ovulation) of only a few days, due to unusually-short cycles (25 days or less as a rule), and/or unusually long periods (seven days or more of bleeding). Since the fertility-window is the 5-6 days before ovulation, for a women in this situation intercourse in the last day or two of her period will fall within the time frame.