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The Daye STI Screening box

Daye STI Screen

Get the best results possible for common STIs like Chlamydia, Gonorrhoea, Trichomonas, as well as Mycoplasma Genitalium and Ureaplasma, with a non-invasive at-home tampon screening

a cream tampon
Pain-free, at-home screen
DNA chain
Results within 5, maximum 10 days
a pink cross signifying that patients can book treatments and consultations
Personalised aftercare

All you have to do is insert the Daye Diagnostic Tampon into your vagina, wear it for 20 minutes, and remove! You don’t need to be on your period, which means you can be menopausal, pregnant or on long term contraception. Post us your sample, and we'll take it from there.

​​We'll test your sample using cutting edge molecular PCR testing (the most accurate way to detect vaginal infections) and as soon as your results are ready we'll send you a detailed report, including your results and summaries of the latest medical research. From here, you can access treatments and book whichever after-care option suits you best.

After your sample reaches our lab, it will be analysed within 5–10 days. You will receive an email notification when your results are ready for review, or if there was an issue with your sample.

Taken from the comfort of your safe space, and used just like a normal tampon, our STI tampon screen collects more vaginal fluid than a standard swab and covers the whole vaginal canal. This means it gets the most comprehensive results possible for common STIs – plus the ones you might not know.

Frequently bought together

Who is the screen for?

If you have recurrent infections

Our Diagnostic Tampon can check for infection-causing microbes and fungi, as well as your levels of protective, good bacteria

We suggest screening 2-4 times per year or when symptoms appear

If you have fertility concerns

The vaginal microbiome plays a vital role in reproductive health, and disruptions can impact fertility.

We suggest a one-off screen to identify all treatable issues

If you are in (peri)menopause

The vaginal microbiome changes during perimenopause, increasing the risk of infections and vaginal dryness.

We suggest two screens per year to maintain a healthy vaginal microbiome
Why should I get screened?

Detect microorganisms that can cause vaginal infections like thrush & BV

Understand if you have an STI or are at a higher risk of UTIs

Determine if your IVF cycle is less likely to be successful

Check for fertility-blocking microbes

Vaginal flora petri dish

Wait, the vaginal micro-what?

Like your gut, your vagina is home to billions of bacteria (some good, some bad). These make up your vaginal microbiome. When it doesn’t contain enough good bacteria, you’re at greater risk of vaginal dryness, fertility challenges, as well as infections like STIs, thrush and BV.

Which pathogens do we test for?

With cutting-edge PCR technology for unparalleled accuracy, Daye tampons collect more vaginal fluid than a standard swab and cover the whole vaginal canal.


Good bacteria in your vaginal microbiome.

Anaerobic bacteria

Cause infections like bacterial vaginosis (BV).


Candida is a fungus which affects 75% of women.

Mycoplasma/ Ureaplasma

According to studies, can affect fertility.


A very common STI caused by a bacterial infection.

*Only available with the STI Screen


An STI that can affect both men and women.

*Only available with the STI Screen


One of the most common STIs worldwide.

*Only available with the STI Screen

Coming soon

Herpes Type I & II

The good, protective bacteria that keep your vagina acidic.

*Only available with the STI Screen

Coming soon

HPV screening

Detects the presence of high risk human papillomavirus strains.

*Only available with the HPV Screen

How does the screen work?

What is included with every screening?


Order your test & get a kit delivered to your door

The kit will arrive at your doorstep in a discreet package. Forget about the waiting rooms.

Women holding a screen kit

Collect and send off your sample to our accredited lab

Activate your kit with your unique code, complete your symptom questionnaire, and send your sample - we'll handle the rest.

Woman holding a diagnostic tampon

Get detailed, actionable results.

We never want to leave you stuck with a set of confusing or potentially troubling results. Your report is informative and educational.

Mobile screen report

Connect with vetted specialists, & get prescription treatments to your doorstep.

After the screening, you can set up virtual consultations with our select fertility, menopause, and sexual health experts. You can also order and receive treatments online.

Mobile consultations

Get free lifestyle hacks based on your results to boost your health

Every report includes science-backed, comprehensive insights into lifestyle changes you can adopt to further enhance your vaginal health.

Mobile lifestyle hacks

Be your own health hero

Got an infection that keeps coming back?

Mainstream treatments for BV and thrush can put us at a higher risk of recurrent infections.

Learn more

Own your fertility journey.

A healthy microbiome is vital for successful fertilisation, implantation, and embryo development.

Learn more

Worried about STIs?

As many as 70% of female STIs are asymptomatic, making proactive screening essential.

Learn more

Choose a screen that works for you

STI + Microbiome Screen

What we test for:


Common BV related bacteria


Mycoplasma hominis





Mycoplasma genitalium

STI Screen

What we test for:




Mycoplasma genitalium

See our Founder’s results!

Wondering what we test for, and what results look like? Enter your email below and Valentina, our Founder, will send you her screening report.

Your email

By entering your email above you agree to receive marketing emails and promotions from Daye.

Your data is for your eyes only

Protecting your privacy is the least we can do

Frequently asked questions

Still have questions? Read all of our FAQs.

Think of it as the immune system to your reproductive tract. It contains good bacteria (lactobacilli) and disruptive microorganisms (yeasts, viruses). A healthy vaginal microbiome is one where the good bacteria keep the disruptive ones in check, preventing them from growing out of control and causing an infection. A balanced microbiome has been linked to a lower risk of vaginal infections, including STIs.

There are several studies that show the correlation between having a healthy vaginal microbiome and a lower risk of getting vaginal infections like thrush and BV, a lower risk of contracting STIs, improved fertility and lower risks of miscarriage and pre-term birth, and a lower risk of developing gynaecological cancers. You can find more study references in your test results.

The tampon offers a non-invasive, familiar method of obtaining a testing sample that makes the screening experience at home more comfortable and accessible. Further, tampons collect a comprehensive sample from the entirety of the vaginal canal, allowing for greater accuracy compared to traditional methods like swabs. The applicator enables smooth insertion in the vagina, and it also prevents the tampon from being contaminated during insertion.

Whatever your needs, we’ve got a package to suit you:

  1. STI Screening only (£89)

You’ll get tested for 6 of the most common sexually transmitted pathogens that cause infections: Chlamydia trachomatis, Neisseria Gonorrhoeae, Trichomonas vaginalis, and Mycoplasma Genitalium. In your report, you will also find a list of personalised, science-backed solutions & resources to help you manage your sexual health holistically. 

  1. STI & Microbiome Screening (£129)

This panel includes all STI targets from the first package and more. We will analyse your microbiome for lactobacilli (the good, protective bacteria), Gardnerella vaginalis and Prevotella (anaerobic bacteria, linked to bacterial vaginosis), Candida (a yeast linked to thrush). 

Our at-home online STI screening service is designed to help you detect and identify specific sexually transmitted infections (STIs) such as Chlamydia, Gonorrhoea, and Mycoplasma. However, it's important to note that our service provides a diagnostic indication based on the tests conducted, but it does not provide a definitive medical diagnosis.

The results you receive from our screening tests are valuable for assessing your risk and providing guidance on whether you should seek medical attention. If your test results indicate the presence of an STI, it means you may be at risk, and we strongly recommend that you consult with a healthcare professional for further evaluation, confirmation, and treatment. You can also connect with vetted specialists and sexual health experts through the Daye platform.

After your sample reaches our lab, it will be analysed within 5–10 days. You will receive an email notification when your results are ready for review, or if there was an issue with your sample.

After you receive your results, you will be able to book a consultation with a vetted specialist and order medication (subject to additional costs and availability). We also help you make lifestyle changes to improve your gynaecological health. Did you know that everything from your contraception and condoms to underwear materials, can impact the composition of good and bad bacteria in your vagina? Stay in the know with Daye's screen and invest in interventions that actually work.

Our test uses quantitative PCR technology, which is able to quantify the relative amounts of microorganisms in your microbiome. DNA-based methods (like PCR) can detect the DNA of all microorganisms found in the sample in an automated and highly accurate way. Studies have shown that PCR is the most accurate way of assessing the presence of STIs and the bacterial composition of the vaginal canal, surpassing standard and time-consuming methods, like microscopy. Furthermore, PCR-based screening can simultaneously detect multiple microorganisms in a single sample, allowing more comprehensive, yet affordable testing.

We use PCR (Polymerase Chain Reaction) technologies. These have revolutionised the screening and diagnosis of sexually transmitted infections (STIs) and vaginal infections, exemplifying a remarkable level of sophistication in molecular diagnostics. Unlike traditional methods that rely on culturing microorganisms, which can be time-consuming and less sensitive, PCR enables the detection of even trace amounts of genetic material from STI-causing pathogens. This high sensitivity allows for early and accurate identification of infections, reducing the risk of complications and transmission. Furthermore, PCR-based STI screening can simultaneously detect multiple pathogens in a single sample, streamlining the diagnostic process. 

Samples are processed in a UKAS-accredited lab, using a CQC-audited lab methodology, and an MHRA registered, CE-marked diagnostic kit.

In order to take a sample at least 5 days must have passed since your last period ended. There are a few other requirements: no antibiotics or antifungals in the last 30 days, no douching, penetrative vaginal sex, and vaginally applied meds or creams in the 24 hours before. That will ensure your microbiome is in a stable state and that your results are not inconclusive.

Using the kit at home is super easy — you just need to insert the provided tampon, wear it for at least 20 minutes (and up to 8 hours), and then put it in the pouches you have received in the kit, and ship it back to us in the same box you received initially. We’ve prepared detailed video instructions which you’ll see after completing the test activation questionnaire in your account.

At Daye, we believe in building products that are rooted in scientific rigour. This means that we never want to get ahead of the science available. Like many other areas of gynaecological health, vaginal microbiome research has been underfunded for decades.

Vaginal microbiome screening is also not a common practice in clinical care today unless you go private.

A vaginal microbiome screen is used to understand the composition of bacteria in your vaginal microbiome. This can help you identify the presence of pathogens, which could be causing you recurrent vaginal infections (Candida, Gardnerella) or preventing you from becoming pregnant (Mycoplasma). If you're peri-menopausal or menopausal, you may want to increase your lactobacilli count so as to fight off vaginal dryness. If you have suffered recurrent UTIs, you may find a disrupted vaginal microbiome to be the cause. Knowing that you have a low lactobacilli count can also help you and your physician make informed decisions on your risk of a recurrent miscarriage or pre-term labour.

Not every physician, however, will recommend a vaginal microbiome screen, due to the method not being widespread yet. Please feel free to consult with your doctor before purchasing this test. If you require a simple bacterial vaginosis or candida test, you can get one for free from your local sexual health clinic.

It's also important to note that by testing your vaginal microbiome you are contributing to an increased global understanding of the best ways to detect and manage gynaecological health diseases, in turn bridging the gender gap in medical research and innovation.

Yes, our tampon-based STI screening is highly accurate and comparable to traditional testing methods. The samples collected are carefully analyzed in a certified laboratory to ensure reliable results.

Yes, we take your privacy seriously. Your personal information and test results are kept confidential. We follow strict privacy and data protection protocols to ensure your information remains secure.

No, it's best to avoid using the STI screening tampon during your menstrual period. You can use the tampon at other times during your cycle when you are not menstruating.

If your test results come back positive, it's important to seek medical advice and treatment promptly. You should contact a healthcare professional who can provide guidance on the appropriate steps to take for treatment and managing the infection.

Many STIs present without symptoms, but can cause serious complications is left untreated. If you are sexually active, it's recommended to get screened proactively every time you change a partner or once every year.

It is possible that if you test for STIs soon after being infected, your test may not find the infection. For this reason you may be advised to repeat the STI screening two weeks after the time when you were at risk of catching it.

  • 2 tampons to take your sample — one to take your sample with and one for backup (double check the expiry date)
  • A blue sterile pouch to keep the tampon sample safe from contamination
  • A see-through shock-proof pouch to ensure the sample is protected on its way to the lab
  • A 10 ml container with a transport medium liquid to protect your sample while on its way to the lab
  • Step-by-step instructions on how to do the test + a card with the activation code
  • For your convenience, the return label, which you can use to ship your sample back to our partner lab, is already attached to the outside of the box.

Don’t use the kit if any of these is missing or damaged. Get in touch with our customer care team and we’ll sort it out.

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Relevant Research

Diagnosis of bacterial vaginosis on self-collected vaginal tampon specimens

2002 • P D J Sturm, P Moodley, G Nzimande

Results of the tampon and vaginal smears showed excellent agreement for both observers (Spearman >0.80). The overall sensitivity and specificity were 91.7% (95% CI: 81.6-96.5) and 79.3% (95% CI: 67.2-87.8), respectively, using the Amsel criteria as reference standard. The tampon provides a specimen for the combined diagnosis of non-ulcerative STIs and BV.

A Self-Administered Technique for the Detection of Sexually Transmitted Diseases in Remote Communities

1997 • Sepehr N. Tabrizi, Barbara Paterson, Christopher K. Fairley, Francis J. Bowden, Suzanne M. Garland

The detection of each organism was significantly greater by PCR in tampon-collected samples than by routine conventional methods (P < .01).

Pilot study of the utility and acceptability of tampon sampling for the diagnosis of Neisseria gonorrhoeae and Chlamydia trachomatis infections by duplex realtime polymerase chain reaction in United Kingdom sex workers

2010 • P T Kimmitt, S N Tabrizi, M Crosatti, S M Garland Frcpa, P C Schober, K Rajakumar, C A Chapman

Besides near-universal acceptability of tampon sampling, the tampon sampling–PCR approach described in this study appeared to have enhanced sensitivity compared with conventional testing.

Vaginal microbiome and sexually transmitted infections: an epidemiologic perspective

2011 • Rebecca M. Brotman

Vaginal bacterial communities are thought to help prevent sexually transmitted infections. Bacterial vaginosis (BV) is a common clinical syndrome in which the protective lactic acid-producing bacteria (mainly species of the Lactobacillus genus) are supplanted by a diverse array of anaerobic bacteria. Epidemiologically, BV has been shown to be an independent risk factor for adverse outcomes including pre-term birth, development of pelvic inflammatory disease, and acquisition of sexually transmitted infections. Longitudinal studies of the vaginal microbiome using molecular techniques such as 16S ribosomal DNA analysis may lead to interventions that shift the vaginal microbiota toward more protective states.

The Vaginal Microenvironment: The Physiologic Role of Lactobacilli

2018 • Emmanuel Amabebe, Dilly O. C. Anumba

Lactobacilli and their antimicrobial and anti-inflammatory products along with components of the epithelial mucosal barrier provide an effective first-line defence against invading pathogens including bacterial vaginosis, aerobic vaginitis-associated bacteria, viruses, fungi and protozoa. An optimal host-microbial interaction is required for the maintenance of eubiosis and vaginal health.

The role of Escherichia coli in reproductive health

2017 • P Cools

Vaginal dysbiosis has been associated with increased susceptibility to and transmission of HIV and other sexually transmitted infections and increased risk of pelvic inflammatory disease, pre-term birth and maternal and neonatal infections.

Daye tampons are manufactured in accordance with medical device standards, including ISO13485 and GMP. In order for a diagnosis to be confirmed, test results from the Diagnostic Tampon should be considered by a licensed healthcare provider alongside a patient's symptoms and medical history. Like every other diagnostic test, lab results are not sufficient for a diagnosis. Daye offers customers the option to connect with independent CQC-regulated healthcare providers virtually and in-person for a confirmed diagnosis. All prescriptions and treatments provided through the Daye platform are issued by third-party, independent pharmacists, who are also regulated under CQC and GPhC.