It is possible to get pregnant if you have intercourse on the day of your period, but the chances of getting pregnant are very small, and it is more likely that you will get pregnant if you have intercourse on the day of your ovulation. The day of menstruation belongs to the safe period, but the safe period contraception is not absolutely safe, because there will be other additional stimuli, may lead to accidental ovulation, that is, not necessarily all in the ovulation ovulation, but also may be in other time ovulation, this time with intercourse may be conceived. It is not recommended to have intercourse during menstruation, because the resistance of women during menstruation is relatively poor, which can easily lead to endometritis, salpingitis, pelvic inflammatory disease, long-term inflammatory stimulation can easily lead to pelvic adhesions and then lead to infertility. Although the possibility of conception is very low, it is not recommended to have intercourse during menstruation.