If your period is gone ahead of time, you can’t get pregnant at the same time, but it’s not absolute. Usually regular menstruation, the day of ovulation will be in the next menstrual period on the 14th, four days before ovulation and five days after ovulation for the ovulation period, at this time the coitus pregnancy rate is higher, so the menstrual period in advance has not yet entered the ovulation period, coitus generally will not be pregnant. If the usual menstrual cycle is not regular, ovulation time is not fixed, this time the end of menstruation in advance may be to the ovulation period, this time coitus may occur in the case of pregnancy. However, conception can be affected by many factors, if there is no need to get pregnant, then it is recommended to use good contraception to avoid unwanted pregnancy.