Ovulation is the process by which a woman's egg cells mature and are released, usually during a woman's menstrual cycle. Although this process is very short-lived, it is vital to a woman's health and fertility.

A woman's menstrual cycle usually starts on the first day of menstruation and lasts for about 28-30 days. If the menstrual cycle is 28 days, then ovulation begins on the 13th day of menstruation. If the menstrual cycle is 30 days, then ovulation begins on the 16th day of menstruation.

However, everyone's menstrual cycle is different, so the specific ovulation period will also be different. In addition, women's menstrual cycle is also affected by many factors, such as living environment, diet, exercise, etc. Therefore, if you wish to determine when you are ovulating, it is best to consult your doctor or professional healthcare advisor.

A woman's menstrual cycle and ovulation are very important to health and fertility. By understanding these physiological changes, we can take better care of ourselves and increase the likelihood of pregnancy during ovulation.