Can a woman really not get pregnant during her safe period? The period between a few days after a woman\’s menstruation ends and before ovulation is called the safe period. During this time, many women believe that birth control is unnecessary because ovulation is not occurring and pregnancy cannot occur. However, the safe period is not completely safe. The following will explain in detail from four aspects whether a woman really cannot get pregnant during the safe period and how to calculate the safe period. 1. The safe period is not a single time period. First of all, it must be clear that a person\’s safe period is determined by multiple factors such as the length of the menstrual cycle, ovulation time, and sperm lifespan. Therefore, it is not a single period.