The vaginal microbiome: not just a buzzword
You’ve probably heard the term gut microbiome thrown around, but did you know your vagina has its own ecosystem too?
It’s called the vaginal microbiome – the community of microorganisms that live in the vagina. It plays an important role in vaginal health and defence against some infections, and researchers are also studying associations between vaginal microbiota and reproductive health.
At femme, we’re all about making the science make sense. So here’s what your vaginal microbiome actually does, what can alter it, and how to support vaginal health without panic-Googling every time something feels “off.”
What is the vaginal microbiome?
The vaginal microbiome is the community of microorganisms, mainly bacteria, that live in the vagina. Many are part of a healthy ecosystem rather than something that needs to be removed.
In many healthy reproductive-age women, Lactobacillus species are dominant. They produce lactic acid and help maintain an acidic vaginal environment that can make it harder for some unwanted organisms to thrive. Vaginal pH is not identical for everyone and can vary with age, hormones, menstruation, sex and other factors, so a single pH number is not a universal definition of “healthy”.
Why the vaginal microbiome matters
A Lactobacillus-dominant vaginal microbiome is commonly associated with vaginal health and protection against bacterial vaginosis. Changes in the microbiome can be associated with symptoms or conditions such as:
- Bacterial vaginosis (BV)
- Changes in discharge or odour
- Some vaginal infections or irritation
Research also links vaginal microbiome patterns with pregnancy and reproductive outcomes, but an association is not the same as a diagnosis or a guarantee about fertility. A microbiome profile on its own cannot tell you whether you will conceive.
What can disrupt or change the vaginal microbiome?
Antibiotics
Antibiotics can alter bacterial communities as well as treating the infection they were prescribed for.
Douching and perfumed products
The vagina is self-cleaning. NHS advice for BV and vaginitis includes avoiding douching and perfumed products around the vagina.
Hormonal changes
Menstruation, pregnancy, perimenopause, menopause and some hormonal treatments can change the vaginal environment and microbiota.
Sex and semen
Semen is more alkaline than the usual vaginal environment and can temporarily change vaginal pH. Sexual activity can also influence vaginal microbiota.
Clothing, sleep and stress are sometimes discussed online as direct “microbiome disruptors”, but the evidence is less straightforward than those claims suggest. Comfortable, breathable clothing can help with moisture and irritation, but it is not a microbiome treatment.
Signs something may need checking
If you notice a new or persistent change, it is better to think in terms of symptoms rather than trying to self-diagnose your microbiome. Speak to a GP or sexual health clinic if you have:
- Unusual discharge, particularly with a strong or fishy smell
- Persistent itching, burning or irritation
- Pain during sex or when urinating
- Symptoms that keep returning after treatment
BV, thrush, sexually transmitted infections and other causes of vaginitis can overlap in how they feel, so recurrent symptoms deserve the right diagnosis rather than repeated guesswork.
How to support vaginal health
1. Avoid over-cleansing
No douching. Avoid fragranced products around the vagina. Wash the external vulval area gently rather than trying to clean inside the vagina.
2. Reduce irritation
Choose products and clothing that feel comfortable for you and change out of damp clothing when practical. If a specific product repeatedly irritates you, stop using it.
3. Practise safer sex
Condoms help reduce the risk of sexually transmitted infections, and may also reduce semen-related pH changes for people who notice symptoms after sex.
4. Be realistic about probiotics
Research into vaginal-specific probiotics, including some Lactobacillus strains, is growing. Results are promising in some studies but inconsistent across products and conditions. Probiotics should not replace diagnosis or recommended treatment for BV, thrush or another infection.
The bottom line: it’s time we talked about vaginal health more openly
Your vaginal microbiome isn’t something to be ashamed of or anxious about – it’s part of your overall health. Understanding the basics can help you recognise changes, avoid unnecessary “detox” products and seek the right support when symptoms persist.
At femme, we believe vaginal health deserves the same straight-talking, evidence-led conversation as menstrual health, fertility or menopause. No shame. No stigma. Just useful information and the right support when you need it.
