From the first day of menstruation, the first seven days and the last eight days belong to the safe period, and the last eight days include the day of menstruation. Fourteen days before the next menstrual period is the day of ovulation, five days before and four days after the day of ovulation is the ovulation period. However, everyone’s menstrual cycle days are different, so it is better to calculate the safe period according to your own menstrual cycle, so as to be more secure. If you cannot calculate it accurately, it is better to take contraceptive measures when having intercourse, such as using condoms throughout, to avoid pregnancy. If your period is regular and no eggs are discharged during the safe period, you will not get pregnant during intercourse. Pay attention to rest, strengthen your diet and nutrition, better to exercise properly, pay attention to vulva hygiene and avoid gynecological infections.