Understanding the TCM Menstrual Cycle: The 4 Phases Explained

24 Jul 2026

By: Yi TCM Admin

A healthy menstrual cycle is considered one of the key indicators of a woman’s reproductive and overall health. Typically divided into four phases, which are the menstrual, follicular, ovulatory, and luteal phases, understanding your menstrual cycle from a Traditional Chinese Medicine (TCM) point of view can uncover insights about your health condition and fertility. TCM considers the body as an interconnected system where the flow of Qi (气) and Blood (血), as well as organ function, influences your cycle. Let us dive into the TCM menstrual cycle and how to support your reproductive health during each of the menstrual phases.

Phase 1 - Menstrual Phase (Day 1-5): Qi (气) and Blood (血)Movement

The menstrual phase starts on the first day of your menstrual flow and may last for 3-7 days. In TCM, menstruation (月经, Yuè Jīng) marks the transition from a Yang-dominant phase to a Yin-dominant phase of the menstrual cycle. This causes the shedding of the uterine lining, where the Qi and Blood are in a state of movement and release. Menstruation is also believed to result from the filling and emptying of the Ren Mai (任脉 – Conception) and Chong Mai (冲脉 – Penetrating) channels. The pituitary gland also starts producing FSH and LH hormones, which will later stimulate the growth of new follicles.

During this phase, TCM focuses on invigorating the flow of vital energy, which helps the lining to be fully discharged. If the Qi is weak or stagnant, individuals may feel fatigue, cramping, and emotional disturbances during their menstrual flow. If you feel that your menstrual flow is irregular or your cycle is outside of the typical range of 26-35 days, it is recommended to seek support from TCM for irregular menstruation. Your practitioner may prescribe acupuncture and Chinese herbs to help support the flow and reduce cramping. TCM herbs such as Chuan Xiong (川芎), and Tao Ren (桃仁) are also beneficial to support a smooth and complete discharge of blood. Women who are menstruating are also advised to rest and do gentle exercise, avoiding strenuous activities.

Phase 2 - Follicular Phase (Post-Menstruation, Day 6-14): Yin (阴) and Blood Nourishment

Following menstruation, the follicular phase is a time of rebuilding of Blood and cultivating Yin energy (阴), which is considered cooling and nourishing. This phase is where the uterine lining begins to develop again as the body prepares for potential conception. There is also a slight Yang aspect at play in the dominant follicle, where oestrogen is secreted. Healthy oestrogen production also determines the quantity and quality of cervical mucus leading up to ovulation.

The follicular phase is a crucial stage to ensure that the body can replenish its resources after menstruation. Eating protein-rich foods is advisable to help strengthen Yin and blood, as well as Chinese herbs such as Dang Gui (当归), Shu Di Huang (熟地黄). Acupuncture for fertility may also be helpful during this phase by supporting a healthy environment for egg development.

Phase 3 - Ovulation Phase (Day 15-17): Peak of Yang (阳) and Qi (气)

The ovulation phase is also known as Zhuan Hua Qi (转化期), where the Yang energy and Qi are at their peak, triggered by a predominance of Yin and the gradual rise of Yang energy. Since Yang is warm and active, women may find that they feel the most confident and energetic during this phase, with an increase in sexual drive. This is the shortest phase of the TCM menstrual cycle when the Luteinising Hormone (LH) surges, triggering a mature egg to be released.

Since ovulation depends on the body’s vital energy, Qi must be strong to support this process. Qi deficiency is believed to cause problems with fertility or irregular ovulation. During ovulation, you are also advised against eating too many raw and cold foods to avoid obstructing the transformation of Yin to Yang and prevent a cold uterus. Chinese herbs that help maintain Qi flow for timely ovulation, such as Chai Hu (柴胡) and Yuan Zhi (远志), may also be beneficial.

Phase 4 - Luteal Phase (Day 18-28): Balance of Yin and Yang

The TCM luteal phase (Yang Qi – 阳期) is the last stage of the menstrual cycle and happens after ovulation. Under the influence of LH, the empty follicle that has released the egg during ovulation forms the corpus luteum, which then secretes progesterone. This hormone helps maintain the uterine lining until menstruation or conception. This phase requires a balance between Yin and Yang, which can be achieved by balancing nourishment, rest, warmth, and physical activity. Women may also feel warmer during the luteal phase due to the rise of progesterone and Yang energy.

In TCM, any imbalance may lead to PMS, mood swings, or bloating. Women are advised to supply enough hydration, as this can nourish the Blood, enhance circulatory flow, and support the Yin. Spicy, fried foods, as well as caffeine, alcohol, and red meat, should also be avoided to prevent heat from building up in the body. TCM for PMS and menstrual cramps, such as acupuncture and moxibustion, may help stimulate healthy Qi flow and address pre-menstrual cramps. Likewise, herbs such as cinnamon bark (肉桂 – Rou Gui) and the Right-Return Pill (右归丸 – you gui wan) can help during the TCM luteal phase by warming the uterus and tonifying the Kidney Yang, which supports progesterone production.

Get TCM Support for a Healthy Menstrual Cycle

The TCM menstrual cycle is an interconnected system and requires a balance of vital substances, including the Qi, Blood, Yin, Yang, and Yin Jing. A healthy and regular menstrual cycle may also reflect how ready your body is for pregnancy. If you want to understand more about your reproductive health, or address issues such as irregular periods, Yi TCM provides TCM for women’s health with a range of holistic treatments based on your needs. Contact us today for a personalised consultation and start your TCM journey with us!