In order to prevent pregnancy, many women pay attention to the safe period in their daily lives, hoping that through the calculation of the safe period, effective contraception can be achieved without taking medication or using condoms. However, how to calculate the safe period is still unclear to many women. So, is it safe seven days before menstruation?

The seven days before menstruation is the safe period. According to traditional beliefs, the safe period can be summarized as the first seven days and the last eight days. The first seven days refer to the seven days before menstruation, while the last eight days refer to the eight days starting from the first day of menstruation, not the eight days after the end of menstruation. This method calculates the safe period, which is more suitable for women with a menstrual cycle of about 28 days and regular menstruation. If a woman's menstrual cycle is less than 26 days, then the first seven days are more accurate, and the last eight days are not applicable.
The safe period can also be divided into pre ovulation and post ovulation safe periods. The safe period before ovulation is from the day before menstruation to the day before ovulation. From the first day after ovulation to the day before the next menstrual cycle, it is the safe period after ovulation, and the contraceptive effect at this time is safer compared to before ovulation.
However, the safe period is not necessarily reliable. Due to the influence of emotions, climate, environment, and other factors on women's ovulation time, ovulation can be delayed, advanced, or even occur. Therefore, if it is for contraception, one should not overly rely on the safe period.