I get super excited when I find research like this because it makes so much sense from a Chinese medicine perspective.
There’s a growing area of research exploring something that, until recently, wasn’t even on the fertility radar: Your gut microbiome may influence how quickly your ovarian reserve declines – and how well your eggs function.
A 2025 study published in Cell Host & Microbe found that the presence (or absence) of gut bacteria significantly impacted ovarian function in mice, including how quickly ovarian follicles were lost and how well they developed.
This is a profound shift in how we think about fertility. Because for a long time, the focus has been on hormones alone.
But this research suggests something deeper: Your fertility is connected to your gut… and from a Chinese medicine perspective: This is not new!
In Traditional Chinese Medicine, the Spleen and Stomach are central to all aspects of health – including reproduction. They are responsible for transforming food into Qi, Blood, and fluids, which ultimately nourish the ovaries and uterus.
The microbiome is simply a modern way of observing something Chinese medicine has always included: If digestion is compromised, reproduction will be too.
Arrrhhh I love it when science starts to catch up :)
You Were Born With All the Eggs You’ll Ever Have – So Look After Them
Women are born with a finite number of oocytes.
Over time, both the quantity and quality of these eggs decline – this is a natural process. However, the rate of decline appears to be influenced by internal factors such as inflammation, metabolic health, and now, the gut microbiome (no surprises for the acupuncturists out there).
From a Chinese medicine perspective:
This relates to Kidney Jing – your foundational reproductive essence. While Jing is inherited, how quickly it is depleted is influenced by lifestyle, diet, stress, and overall health. The Spleen and Stomach play a protective role here: They generate the Blood and nourishment that help preserve Jing over time.
So while you are born with your eggs, the internal environment you create determines how well they are maintained.
Mice Without Gut Bacteria Showed Accelerated Loss of Ovarian Reserve
In the 2025 study, researchers examined germ-free mice – mice raised without any gut microbiota.
They found that these mice experienced accelerated depletion of ovarian follicles, along with disruptions in normal follicle development.
When gut bacteria were reintroduced, aspects of ovarian function improved.
This suggests that the microbiome may play a role in protecting ovarian reserve.
From a Chinese medicine perspective: If the Spleen and Stomach are unable to properly transform and transport nutrients, the body cannot adequately nourish reproductive tissues.
In TCM terms:
- Weak digestion → reduced production of Blood
- Reduced Blood → insufficient nourishment of the ovaries
- Over time → decline in reproductive capacity
The microbiome can be understood as part of this digestive function – essential for extracting and distributing nourishment.
Your Gut Bacteria Produce Compounds That Communicate With Your Ovaries
One of the most fascinating aspects of this research is that gut bacteria produce metabolites – including short-chain fatty acids (SCFAs) – that circulate throughout the body.
These compounds influence:
- Inflammation
- Oxidative stress
- Cellular signalling pathways
All of which are relevant to ovarian health and egg quality.
In other words: Your gut and your ovaries are in constant communication. Again, no surprises for the acupuncturists – we are intimately connected throughout our body!
From a Chinese medicine perspective:
This reflects the concept of Qi movement and internal communication between organ systems.
The Spleen and Stomach don’t just digest – they transform and distribute information and nourishment throughout the body.
When this system is functioning well:
- Qi flows smoothly
- Blood nourishes deeply
- Organ systems remain in harmony
When it is impaired:
- Dampness, Heat, and stagnation can develop
- Communication between systems becomes disrupted
What modern science describes as biochemical signalling, Chinese medicine has long understood as the movement and transformation of Qi.
Fibre Changes Egg Quality
The study also explored dietary patterns.
Mice fed a high-fat, low-fibre diet showed:
- Poorer oocyte quality
- Increased inflammatory markers
- Disruption to normal ovarian function
When fibre was introduced back into the diet, there were improvements in:
- Egg quality
- Ovarian environment
- Microbial composition
Fibre feeds beneficial gut bacteria, which then produce compounds that support systemic health.
From a Chinese medicine perspective:
Diets that are overly rich, greasy, and lacking in plant-based foods tend to create Dampness and Heat.
These patterns are commonly associated with:
- Inflammation
- Stagnation
- Impaired reproductive function
Fibre-rich foods, particularly when cooked and easy to digest, help:
- Support the Spleen
- Prevent stagnation
- Promote smooth Qi flow
Different language – same principle: What you eat shapes your internal environment!
Best Foods for Your Gut and Ovaries
To support both the microbiome and reproductive health:
Focus on:
- Warm, cooked vegetables
- Root vegetables
- Whole grains
- Legumes
- Bone broth
- Moderate amounts of healthy fats
Minimise:
- Ultra-processed foods
- Excess alcohol
- Highly inflammatory oils
- Diets very low in fibre
From a Chinese medicine perspective:
The goal is to:
- Strengthen the Spleen
- Build Blood
- Protect Jing
And that always begins with digestion. Applause for our digestive system please – it is so central to our entire being.
This Research Is On Mice — So Why Does It Still Matter?
It’s important to acknowledge that this study was conducted on mice.
Human reproductive research is complex and often limited by ethical constraints – we cannot experimentally manipulate ovarian reserve or the microbiome in the same way – and we wouldn’t want to – just to get data!
However, animal studies are valuable for understanding mechanisms – how systems interact.
And when findings align with:
- Known human physiology
- Clinical observations
- Long-standing medical systems like Chinese medicine
They become highly relevant.
From a Chinese medicine perspective:
Traditional Chinese Medicine has always relied on detailed observation of patterns within the human body.
The microbiome was not visible, but its effects were observed through digestion, energy, and reproductive health.
The concept of the Spleen and Stomach has, for centuries, encompassed what we are now beginning to describe scientifically as the gut microbiome.
Final Thoughts
This research adds another layer to an already important truth:
Fertility is not isolated to the ovaries.
It reflects the state of the entire body.
And your gut plays a central role in shaping that environment.
If you support it well, you are not just improving digestion.
You are contributing to the conditions that help preserve and support your reproductive health over time.
And that is something worth paying attention to. As acupuncturists this reality is built into our DNA. When you come to see us, we will always ALWAYS always look at your digestion. Amen!
Reference:
Munyoki, S.K. et al. (2025). The microbiota extends the reproductive lifespan of mice by safeguarding the ovarian reserve. Cell Host & Microbe.
Get in touch…
If you’d like to find out how we can help support you. Booking an intro call on our bookings page. Book online or call 1800 RED TENT.