The luteal phase refers to the second half of a woman’s menstrual cycle, when the ovary expels an egg and then enters the luteal phase of ovarian development. After ovulation and no fertilization of the egg occurs, the luteal phase usually shrinks in about fourteen days and the woman has her menstruation. In a menstrual cycle there are three phases: follicular growth and development, ovulation and luteal phase, which carry on a cycle of weeks and weeks. When a woman has luteal insufficiency, it may lead to early menstruation, and when the corpus luteum atrophies, it may also lead to delayed menstruation. Therefore, it is important to maintain a regular life during a menstrual cycle and avoid overworking, staying up late and other adverse stimuli, which may lead to abnormalities in the follicular development phase and luteal phase, or else it may also lead to menstrual disorders in women.