A woman's menstrual cycle usually lasts from 28 to 35 days, and everyone's cycle is slightly different. Most people's cycles are 28 days, but a few have longer or shorter cycles. During a cycle, a woman's ovaries release an egg, which waits for fertilization over the next few days. A woman's ovulation period refers to the few days after the egg is released from the ovary. This is the period when women are most likely to become pregnant.

1. Observe the menstrual cycle: Understand your menstrual cycle, calculate the first day of the next menstrual period, and subtract 14 days, which is the woman's ovulation period.

2. Measure body temperature: Women can determine their ovulation period by measuring body temperature. During the cycle, a woman's body temperature will rise by about 0.5 to 1 degree Celsius, and this day is the woman's ovulation period.

3. Use a pregnancy test stick: Women can use a pregnancy test stick to determine their ovulation period. Pregnancy tests can determine whether fertilization has occurred by detecting hormones in the body.

4. Observe symptoms: Some women may feel mild discomfort during ovulation, such as nausea, vomiting, headache, breast tenderness, etc. These symptoms may disappear within a few days.

While these methods can help women determine when they are ovulating, they are not always accurate. If a woman is not planning to become pregnant, it is best to find other ways to determine when she is ovulating, such as using a calendar or a doctor's advice.

Women's menstrual cycles and ovulation periods are very complex and delicate. Women can use these methods to determine their ovulation periods, but if you have any concerns or questions, it is best to seek advice from your doctor.