news-tldr.com

The important facts, the open questions, and the sources — without the churn.

← Latest briefing

Health

UK researchers launch CycleTrack study to build world's largest menstrual fluid biobank

Led by the universities of Bristol and Exeter, the project aims to improve treatments and shorten diagnosis times for heavy periods, endometriosis, and fibroids.

Updated Aug 26, 2026 · 05:18 UTC1 reports

The short version

  • The CycleTrack study is recruiting thousands of volunteers in the UK to track real-time health data and submit menstrual fluid samples.
  • The research aims to address long-standing data gaps, identify biological signals of heavy menstrual bleeding, and uncover links to conditions like iron deficiency and fibroids.
  • Initial data collection is scheduled to run through November 2027, with preliminary findings expected in early 2028.

Key facts

  • Researchers from the universities of Bristol and Exeter are launching the CycleTrack study, which aims to create the world's largest menstrual fluid biobank.[BBC News]
  • The study is recruiting participants from two major UK birth cohort studies: Children of the 90s in south-west England and Born in Bradford in West Yorkshire.[BBC News]
  • Participants will track symptoms, sleep, mood, and wellbeing via a specialized app and questionnaires, while providing menstrual fluid samples using specially designed pads over three cycles.[BBC News]
  • By linking fluid samples with existing genetic and long-term health data from the cohort studies, researchers hope to identify biological markers for earlier diagnosis and personalized treatment.[BBC News]
  • The project is part of a broader international program called 'The Missed Vital Sign,' led by Wellcome Leap.[BBC News]
  • Sample collection begins this month, with data collection slated to conclude by the end of November 2027, and preliminary findings expected by early 2028.[BBC News]

What remains uncertain

  • Whether the research team will secure the funding required to expand future phases of the study to participants beyond the two initial birth cohorts remains dependent on external resources.[BBC News]

Sources