The safe period and ovulation period are very important factors in sexual behavior. Understanding these concepts can help us better protect ourselves and our partners and avoid unnecessary risk and pain.

So, how to calculate the safe period and ovulation period? We can calculate it by:

1. Calculate basal body temperature: Measuring basal body temperature can help you understand a woman’s menstrual cycle. At the beginning of the cycle, a woman's body temperature rises and then gradually drops. During the few days between the safe period and ovulation, a woman's body temperature will remain at a relatively low level.

2. Observe the periodic table: Observing a woman’s periodic table can help us understand the safe period and ovulation period. The periodic chart usually shows the number of days in a woman's cycle, as well as the timing of safe periods and ovulation.

3. Use a safe period calculator: Many websites and apps provide safe period and ovulation calculators to help us calculate the safe period and ovulation period.

Although these methods can help us understand safe periods and ovulation periods, they are not always accurate. Therefore, before having sex, it is best to consult a doctor or professional counselor to ensure that we understand our menstrual cycle and take appropriate steps to protect ourselves and our partners.

Finally, let us emphasize again that safe periods and ovulation periods are only part of sexual activity, and sexual activity itself can also cause risks and pain. Therefore, before having sex, make sure you and your partner are both in good health and take appropriate safety measures to protect yourself and your partner.