The calculation of ovulation period and safe period is one of the important factors in maintaining good health. Most people believe that ovulation and safety periods are fixed, but this is not the case. This article will explain how to calculate ovulation and safe periods, and how to avoid getting pregnant during safe periods.

However, the safety period is not absolutely safe. Although the days in a woman's menstrual cycle are fixed, they are affected by many factors, such as diet, exercise, stress, etc. In addition, some drugs, such as hormonal drugs, may also affect a woman's cycle.

Therefore, in order to better protect ourselves, we need to understand how to calculate ovulation and safety periods.

There are many ways to calculate ovulation and safe periods. Among them, the most common method is to predict by measuring body temperature and observing symptoms.