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A disturbing website claiming to track the menstrual cycles and ovulation periods of female VTubers has gone viral, triggering widespread backlash across the VTuber community and social media over privacy, consent, and harassment concerns.

The site first gained attention after X user @ShitpostRock posted that they had discovered a platform tracking the cycles of hundreds of VTubers, allegedly using public tweets and stream clips as data points. The post quickly spread, drawing millions of views and prompting disbelief, anger, and ridicule in equal measure.


How The VTuber Ovulation Tracker Works

According to screenshots shared online, the website claims to monitor more than 450 VTubers. It reportedly logs dates and times of tweets or stream moments that mention symptoms like stomach pain, headaches, tiredness, or feeling unwell, then uses those observations to speculate about menstrual cycles and ovulation windows.

An “observation” section on the site appears to manually record these moments, before projecting them onto virtual calendars that assume a regular monthly cycle. Critics have pointed out that this method ignores basic medical realities, including irregular cycles, unrelated illnesses, hormonal treatments, and chronic conditions.

Even based on the site’s own screenshots, the predictions appear inconsistent and unreliable, often treating any mention of discomfort as evidence of menstruation.

VTubers React With Anger And Dark Humour

VTubers named on the site have begun speaking out, with reactions ranging from outrage to satire.

Twitch VTuber Shekai condemned the website as an attempt to make “women’s lives miserable,” adding that whoever added her should “seek therapy.”

Others highlighted how invasive the tracking feels, especially for creators who deliberately use VTuber avatars to maintain distance between their online persona and real life.

VTuber chibidoki responded with humour, joking that she would start tweeting about stomach pain every day “so the VTuber ovulation tracker short circuits in confusion.”

While light-hearted, the comment underlined a key point, the data being used is fundamentally unsound.

When Parasocial Behaviour Crosses A Line

The controversy has also reignited discussion around parasocial relationships and how far some fans go in trying to access personal information about creators.

VTuber aliciaxlife shared that being tagged in discussions around the website forced her to publicly disclose sensitive medical details. She revealed she has been recovering from uterine cancer and has not had a period in over a year due to intensive hormone therapy.

She urged people to remember that many women experience endometriosis, irregular cycles, or medical conditions that affect menstruation, and stressed that consent should be required before adding anyone to such a database.

Why The Website Has Alarmed The Community

Beyond accuracy issues, many see the site as a form of stalking that normalises invasive behaviour towards female streamers. Critics have also pointed out that the site categorises VTubers under labels such as “ovulating” or “fertile,” which several VTubers and commentators believe suggests fetishistic intent rather than harmless curiosity.

VTubers are often private by design, choosing avatars precisely to avoid scrutiny of their bodies and personal lives. Tracking menstrual cycles based on speculative data has been widely described as crossing a clear ethical boundary.

What Happens Next

At the time of writing, the website remains live, though it is not being linked by most outlets due to its nature. The growing backlash has already pushed more VTubers to speak openly about boundaries, consent, and the realities of living with medical conditions while being a public figure.

Whether the site is taken down or not, the incident has sharpened conversations around privacy, parasocial extremes, and the responsibility platforms have in protecting creators from invasive behaviour that goes far beyond normal fandom.