What one year of Clue data reveals about women's health in 2025
A snapshot of how hormonal health intersects with our daily lives
Nearly one in five people tracking their cycles rated their period cramps as severe, according to new global tracking data from Clue. The insight is drawn from the company’s annual Our Year in Cycles dataset, based on hundreds of millions of anonymised logs between October 2024 and October 2025.
Across the year, Clue app users logged 44.6 million days of cramps, making it the most frequently tracked pain symptom. Cramps accounted for 35% of all pain entries, followed by breast tenderness (12%), lower back pain (11%) and headaches (10%). Clue says the volume and severity of pain logs point to a widespread health burden that is routinely absorbed into daily life.
“Menstrual health affects over half the population, yet the cultural taboo around it has left generations without the knowledge or support they deserve,” said Rhiannon White, CEO of Clue.
“Our Year In Cycles reveals how profoundly our hormonal patterns intersect with our daily lives… By transforming millions of lived experiences into clear, accessible insights, Our Year In Cycles makes it possible for all of us to talk about hormones, pain, pleasure and wellbeing with the same openness we bring to other life topics.”
Bleeding and product use
Users tracked 280 million days of bleeding during the period analysed — the equivalent of nearly 767,000 years of periods if experienced by one person. Pads remained the most commonly used period product (63%), while tampons accounted for 14%. Despite heightened interest in reusables, Clue says real-world adoption appears to be shifting more slowly than cultural conversation suggests.
Sex and pleasure patterns
New Year’s Day was the most active date for sex drive, orgasms, sex and fantasies among users globally, while September 10 recorded the lowest libido. Across 2025, Clue users logged 34 million sex sessions and 4.4 million orgasms. The company says this disparity reflects an ongoing pleasure gap, with pleasure still less frequently tracked than sex.
Gen Z users (18–24) tracked half of all orgasms in the app and tracked masturbation and fantasies at the highest rates, with masturbation logged 20% more often than other age groups and fantasies 40% more often. Millennials (25–34) were the most frequent trackers of sex toy use. By geography, the Philippines topped Clue’s rankings for both sex frequency and orgasms logged.
Emotional and sleep patterns
Mood swings were the most common emotional entry, making up 17% of all feelings logged. The dataset identified 6 November 2024 as the saddest, angriest and most stressed day of the year. Weekly emotional rhythms showed Mondays as the lowest-mood day, Thursdays the most stressful, Saturdays the happiest and most energised, and Sundays the most common day for sex.
Sleep disruption was widespread: 38% of logs recorded waking up tired, 15% reported difficulty falling asleep, 14% noted restless sleep and 10% tracked vivid dreams.
Engagement with reproductive healthcare
Nearly 250,000 OBGYN appointments were recorded in the app across the year. Users aged 18–34 accounted for 84% of these visits and were 70% more likely to track STI check-ups than older cohorts, which Clue says may indicate decreasing stigma around sexual and reproductive healthcare.
Clue’s Chief Medical Officer, Dr Charis Chambers, said the aggregated data highlights how common symptoms map to hormonal patterns.
“Severe cramps, mood shifts, low energy, disrupted sleep are deeply common and valid,” she said.
“By representing real people with real data, we can help reduce shame and stigma around the menstrual health conversation.”
Clue says the findings show how cycles shape pain, mood, sleep, intimacy and daily wellbeing, offering a global snapshot of lived experience across millions of users.
The scale of this dataset is wild. 280 million days of bleeding logged is basically taking individual datapoints that used to be invisible and turning them into population-level health intelligence. What stands out is how 1 in 5 rating cramps as severe translates to a real health burden that just gets absorbed into daily life without much visibility. The fact that Gen Z tracks orgasms at twice the rate of other cohorts says something intresting about shifting norms arond openness. Would love to see how this kind of aggregated self-reported data compares to traditional clinical trial cohorts in terms of signal quality.