Ovulation refers to the time during a woman’s menstrual cycle when eggs are released from the ovaries and enter the fallopian tubes. For many women, knowing when they are ovulating is important because it helps predict a woman's fertility and help with family planning.

Generally speaking, a woman's menstrual cycle lasts about 28 days, and the egg is released from the ovary for about 14 days each month. Therefore, the monthly ovulation period is 14 days minus 14 days, that is, day 5 to day 11.

However, everyone's cycle is different, so women may need to do some additional testing to determine when they are ovulating. Some methods include:

1. Measure basal body temperature: Women should measure their body temperature when they wake up every morning and record changes in body temperature. Generally speaking, the body temperature will rise before ovulation and fall after ovulation.

2. Observe sexual desire: Women’s sexual desire may increase during ovulation, which may be caused by the presence of eggs.

3. Use a pregnancy test tool: Women can use a pregnancy test tool to determine their ovulation period, such as a pregnancy test stick or HCG test.

While these methods can help women determine when they are ovulating, they are not always accurate and reliable. Therefore, it is best for women to consult their doctor to determine the best testing method.

A woman's menstrual cycle and fertility are affected by many factors, including genetics, lifestyle, health, and more. Therefore, women should exercise regularly, maintain a healthy diet and lifestyle, and consult a doctor to ensure that their fertility is best maintained.

Finally, women should remember that each woman's cycle is unique, and therefore, it is impossible to determine a specific ovulation period. The best way is to get tested regularly and follow your doctor's advice to ensure your fertility is best maintained.