The safe period needs to be calculated under the condition that the woman’s menstrual cycle is regular, and generally the five days after the menstrual period belong to the safe period range.
Usually, a woman’s physiological cycle lasts from 21 to 35 days, with an average of 28 days. The specific cycle may vary due to the different conditions of one’s own body and organism.
Safe period generally refers to the time outside the ovulation cycle, you need to project the first day of the next menstrual cycle, 14 days forward for the date of female ovulation, 5 days before and 4 days after the date of ovulation are ovulation, the other time can be judged as the safe period. Therefore, 5 days after menstruation usually belong to the safe period.
In addition, it is worth noting that the safe period is not absolutely safe, if there is no preparation for pregnancy, you should still do a good job of contraception to avoid unwanted pregnancy.