The luteal phase refers to the period of a woman’s menstrual cycle, from after ovulation to the day before the onset of menstruation. The female menstrual cycle includes the menstrual phase, follicular phase, and luteal phase. After menstruation, the follicles in the ovaries begin to develop, mature and ovulate, and the remaining follicular tissue after ovulation will slowly form the corpus luteum. During the luteal phase, the ovaries secrete luteinizing hormone, which is used to maintain the thickness of the endometrium and allow the fertilized egg to successfully implant. If there is no fertilized egg at this time, the endometrium will soon disintegrate, the endometrial tissue will be shed and the menstrual cycle will end with the onset of menstruation. The length of the luteal phase is relatively constant, averaging 14 days in non-pregnant women. If a woman’s menstrual cycle is 28 days, then the 15th-28th of the menstrual cycle is the luteal phase. The luteal phase requires abstaining from spicy and stimulating foods, eating light, easy-to-digest foods, paying attention to body warmth and rest, and adjusting the mood.