A woman's menstrual cycle usually lasts 28 days, but every woman's menstrual cycle is different. Generally speaking, a woman ends her period on the 24th and then releases her eggs within the next 7-10 days. This is the ovulation period. During ovulation, a woman's egg waits for fertilization and then implantation to become a fetus.

First, women can determine their ovulation period by measuring their body temperature. Each morning when women woke up, their temperatures were taken, and changes in body temperature were recorded. Generally speaking, a woman's body temperature will rise by 0.3-0.5 degrees Celsius during ovulation.

Secondly, women can determine their ovulation period by observing their menstrual cycles. Generally speaking, in a woman's menstrual cycle, ovulation usually occurs 14 days before the next menstrual period. However, this is only a general rule and may not always be accurate.

Finally, women can also determine ovulation by observing symptoms. For example, women may experience fatigue, breast swelling, headaches, nausea, and more. These symptoms may occur during ovulation, but they may not.