The luteal phase and ovulation period are two very important periods for women of childbearing age, as they determine a woman's fertility. Generally speaking, a woman's luteal phase begins on the 14th day of the menstrual cycle and lasts about 4-5 days. The ovulation period for women is within a few days after the end of the luteal phase, usually lasting about 1-2 days.

A woman's luteal phase can be determined by measuring her basal body temperature. Basal body temperature refers to the body temperature measured orally when a woman wakes up in the morning. Generally speaking, the luteal phase for women is about 35-40 days.

A woman's ovulation period can be determined by taking her body temperature. Generally speaking, a woman's ovulation period begins on the 14th day of the menstrual cycle and lasts for about 1-2 days. During this period, a woman's body temperature will rise by about 0.3-0.5 degrees Celsius, which is a sign of female fertility.

In addition to taking your temperature, women can determine their luteal phase and ovulation through other methods. For example, you can judge by observing your menstrual cycle, or you can use a thermometer and calendar to record your basal body temperature and menstrual cycle.