Menstruation comes before a week is the same sex pregnant possibly

Generally speaking, women in the ovulation period of the possibility of pregnancy in the same room will be relatively large, but in the week before menstruation does not belong to the ovulation period, this time the follicle has not matured, so the possibility of pregnancy is relatively small. But if you do not want to get pregnant, it is recommended to do the corresponding contraceptive measures when the same room.