Can I get pregnant on my period?
Yes, but it's probably more difficult.
Women are fertile for up to six days before ovulation. If a woman has a long duration of uterine bleeding (called menses) and/or her ovulation occurs early, then it is possible that the fertile time and the menses may overlap. Intercourse during this overlap could produce a pregnancy.
The presence of blood may make conceiving more difficult, however, for a variety of reasons: