When the Uterus Is More Than a Reproductive Organ
For decades, the uterus has largely been understood as a reproductive organ whose primary role is to support pregnancy. In clinical practice, conditions such as uterine fibroids, abnormal uterine bleeding, or other gynecological disorders have often led to hysterectomy, with the assumption that removing the uterus—while preserving the ovaries—would not significantly affect long-term health, as hormonal function would remain intact.
However, in recent years, this assumption has been increasingly questioned.
A growing body of research suggests that women who undergo hysterectomy before natural menopause, even with ovarian preservation, may have an increased risk of long-term neurological outcomes, including cognitive decline, Parkinsonian symptoms, and changes in brain function. Although the exact mechanisms remain under investigation, one emerging concept is gaining attention: the Uterus–Brain Axis.
This concept proposes that the uterus is not an isolated reproductive organ, but part of a broader communication network involving the nervous system, endocrine signaling, immune modulation, and inflammatory pathways. This raises an important question:
📌 Could the removal of the uterus influence brain function more than previously understood?
Interestingly, while modern science is only beginning to explore this connection, Traditional Chinese Medicine (TCM) has described a functionally similar interconnection for over two thousand years.
The Uterus in Traditional Chinese Medicine: Bao Gong (胞宮)
In Traditional Chinese Medicine, the uterus is referred to as the Bao Gong (胞宮).
- “Bao” (胞) refers to that which envelops, nourishes, and supports life
- “Gong” (宮) means a palace or central chamber
Thus, the uterus is not merely viewed as a container for pregnancy, but as a central regulatory organ within the female reproductive system, deeply integrated into systemic physiology.
In classical TCM theory, the uterus is closely connected to three major organ systems:
- Kidney (Shen)
- Liver (Gan)
- Heart (Xin)
It is also functionally linked to extraordinary meridians such as the Chong Mai (Penetrating Vessel) and Ren Mai (Conception Vessel), which regulate blood flow, reproductive function, hormonal cycles, and developmental timing.
Why the Uterus Is Connected to the Heart
In biomedical terms, the heart is understood as a mechanical pump. In TCM, however, the Heart has a much broader meaning.
The Heart is considered the residence of Shen (神), which encompasses:
- Consciousness
- Thought and cognition
- Memory
- Emotional processing
- Sleep regulation
- Personality expression
In other words, the Heart represents the central hub of mind and awareness.
A classical passage from the Huang Di Nei Jing (Yellow Emperor’s Inner Canon) states:
“The Bao Mai (uterine vessel) belongs to the Heart and connects to the uterus.”
📌 This indicates that the uterus is not an isolated structure, but is functionally linked to the Heart, suggesting a direct relationship between reproductive physiology and emotional–cognitive regulation.
The Kidney–Uterus Relationship: Essence (Jing) and Biological Foundation
Another classical statement describes:
“The Bao Mai is governed by the Kidney.”
In TCM, the Kidney is not simply an organ of filtration. It is the storage site of Jing (Essence), which is the fundamental substance responsible for:
- Growth and development
- Reproduction and fertility
- Hormonal regulation
- Aging processes
- Neurological vitality
From this perspective, it is not surprising that Kidney deficiency patterns are associated with infertility, menstrual irregularities, early menopause, and age-related decline.
Importantly, Kidney Jing is also considered a foundational substrate for brain function, linking reproductive health and cognitive performance within the same physiological system.
Postpartum and Menopause: Why Emotion and Cognition Change
Clinically, many women report cognitive and emotional changes during major reproductive transitions, such as:
- Postpartum period: memory lapses, emotional instability, sleep disturbance, or postpartum depression
- Menopause: forgetfulness, irritability, anxiety, insomnia, and reduced cognitive clarity
From a TCM perspective, these changes are associated with shifts in the dynamic balance between the Heart, Kidney, and Uterus systems, as well as changes in Blood and Essence.
When Heart Blood is insufficient or Heart–Kidney communication becomes disharmonious, the Shen is not adequately nourished, resulting in emotional and cognitive disturbances.
While the terminology differs from modern neuroscience, both systems recognize a consistent principle:
🚩 Changes in reproductive physiology are closely associated with changes in mood, cognition, and brain function.
What Modern Science Is Beginning to Reveal
Contemporary biomedical research increasingly views the body as an interconnected network rather than a collection of isolated organs.
Newly described communication pathways include:
- Gut–Brain Axis
- Heart–Brain interactions
- Immune–Brain communication
- And more recently, the Uterus–Brain Axis
These systems reflect a shared principle: organs communicate continuously through neural, hormonal, immune, and biochemical signaling pathways.
The uterus, therefore, may play a more active systemic role than previously assumed.
Traditional Chinese Medicine and Modern Science: Two Perspectives
It is important not to oversimplify or assume that Traditional Chinese Medicine anticipated modern neuroscience. Both systems are built on different paradigms.
Modern science explains the body through neural, hormonal, immune, and molecular mechanisms, while TCM describes functional relationships through concepts such as Qi, Blood, Shen, and organ networks.
However, both perspectives increasingly converge on one key idea:
The uterus is not only a reproductive organ, but part of an integrated system that influences both body and mind.
The Body as a Network, Not Isolated Parts
Both Traditional Chinese Medicine and modern biomedical science increasingly support a shift in perspective: the human body functions as an interconnected system rather than a collection of independent organs.
Physiological processes are now understood as dynamic interactions involving neural, hormonal, immune, and biochemical signaling pathways. In parallel, TCM describes functional relationships through the coordinated roles of organ systems such as the Heart, Kidney, Liver, and Uterus.
As research continues to evolve, it becomes more evident that structures once considered secondary may have broader systemic roles than previously assumed.
👉 This shared perspective encourages a more integrative approach to clinical thinking—one that considers systemic relationships rather than isolated organ function.
References (Uterus–Brain Axis & Cognition)
1. Uterus and cognitive function (preclinical evidence)
- Koebele SV, et al. (2023).
Gynecological surgery in adulthood imparts cognitive and brain changes in rats: A focus on hysterectomy at short-, moderate-, and long-term intervals after surgery.
Hormones and Behavior, 155:105411.
https://doi.org/10.1016/j.yhbeh.2023.105411
2. Evidence that uterus removal affects brain function (animal model)
- Koebele SV et al. (2019).
Hysterectomy uniquely impacts spatial memory in a rat model.
Endocrinology.
National Institute on Aging summary:
https://www.nia.nih.gov/news/uterus-plays-role-brain-function-animal-study-shows
