The post-menstrual ovulation period refers to the few days after a woman’s menstrual period in the middle of each month. It is also one of the most fertile periods in a woman’s body. During this time, a woman's ovaries begin to release eggs, and the body determines when to begin pregnancy based on the health and quality of the eggs.

So, what is the method to calculate the ovulation period after menstruation? Generally speaking, there are two ways to calculate the ovulation period after a woman’s period:

1. Predict by measuring basal body temperature. A woman's basal body temperature is recorded by measuring her oral or anal body temperature and usually changes around the time of her period. Generally speaking, a woman's basal body temperature will reach its highest value during the ovulation period after menstruation, and will continue to decrease thereafter.

2. Predict by observing the menstrual cycle. If a woman has regular menstrual cycles, she can predict the ovulation period after her period by observing her menstrual cycle. Generally speaking, during the ovulation period after menstruation, a woman’s menstrual cycle will become more regular and the quality of her eggs will also improve.

However, if a woman suffers from certain diseases or malnutrition, it may cause irregular ovulation after menstruation. In this case, women may want to consult with their doctor to determine the best calculation and prediction methods.

In addition, women can also use some other methods to predict ovulation after menstruation. For example, women can watch for changes in their sexual desire, which may have an impact when ovulation occurs after their period. Women can also observe changes in their breasts, which may have an impact when ovulation arrives after their period.

To sum up, the ovulation period after menstruation is very important for maintaining female fertility and getting pregnant. By understanding how ovulation is calculated after your period and how to predict its arrival, women can better manage their fertility and ensure a successful pregnancy.