Plain-English translation of NCT04196595 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
This is a large observational study designed to help researchers understand women's menstrual cycles and gynecologic health conditions, including polycystic ovary syndrome, infertility, and menopause. You would participate by using the Apple Research app on your iPhone to share information about your menstrual health over time. This study does not involve taking any medication—only tracking and reporting health information.
Researchers have limited data about how menstrual cycles and reproductive health conditions affect women's lives. By collecting information from a large number of women, this study aims to fill gaps in understanding these conditions and improve diagnosis and treatment options.
You likely qualify if…
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You would download the Apple Research app on your iPhone and answer questions about your menstrual cycle, reproductive health, and related conditions whenever prompted by the app. There are no in-person visits or time-intensive appointments—you simply respond to surveys and share information on your own schedule through your phone. The study is ongoing and long-term, meaning you could participate for months or years as researchers continue to gather data.
AI-generated summary from trial data · Jul 9, 2026 · Not medical advice
United States
Sponsor
Apple Inc.
Collaborators
Harvard School of Public Health (HSPH), National Institute of Environmental Health Sciences (NIEHS)
Enrollment target
~500,000 participants
Started
November 2019
Primary completion
November 2029
Age range
18 Years and older
Last updated on clinicaltrials.gov in July 2024.
Reach out to the team running this trial. Response times vary — some teams are faster than others.
Central contact
Shruthi Mahalingaiah, MD
Harvard School of Public Health (HSPH)
Tell us you're interested and we'll help connect you with the research team. We'll walk you through what to expect first — no email needed to get started.