Apple Women’s Health Study team at Harvard T.H. Chan School of Public Health today released a preliminary study update on the Apple Women’s Health Study, offering insights on women and their menstrual symptoms.
The update, based on a cohort of 10,000 participants and inclusive of varying ages and races across the US, highlights how large-scale, longitudinal research on menstruation can help advance the science around women’s health and destigmatize menstruation.
According to the company, the Apple Women’s Health Study is a first-of its-kind research study that aims to advance the understanding of menstrual cycles and how they relate to various health conditions such as polycystic ovary syndrome, infertility, and menopause transition.
Many physicians regard women’s menstrual cycles as an important window into their overall health, but the topic is notably under-researched. Medical research on menstruation has often been limited to studies of smaller sizes, which are not representative of the broader population. Through the Research app, the Apple Women’s Health Study invites women across the US to contribute to research simply by using their iPhone, and Apple Watch if they have one.
The landmark study allows for collection of a comprehensive set of cycle tracking and other health data, strengthened through participant surveys, from individuals across various stages of their life, varying races, and throughout all US states and territories. Participants control the data types shared with the study, with transparency into how the data will be used for the purposes of the study.
Harvard Chan School researchers’ preliminary analysis of data validates women’s experiences of a wide range of menstrual cycle symptoms including some that are less commonly known or discussed. The most frequently tracked symptoms were abdominal cramps, bloating, and tiredness, all of which were experienced by more than 60 percent of participants who logged symptoms. More than half of the participants who logged symptoms reported acne and headaches. Some less widely recognised symptoms, like diarrhoea and sleep changes, were tracked by 37 percent of participants logging symptoms.
Initial analysis also suggests these symptom trends hold true across a wide range of demographics, including age, race, and geographic location. For example, across Black, Hispanic, and white participants, the most commonly reported symptoms were abdominal cramps, bloating, and tiredness.
Dr. Michelle Williams, Dean of the Faculty at Harvard Chan School said “Our study will help to achieve a more gender equal future, in which all people with menstrual cycles have access to the health services and menstrual products needed to feel safe and empowered. By building a robust generalisable knowledge base, the Apple Women’s Health Study is helping us understand factors that make menstruation difficult and isolating for some people, in addition to elevating awareness of a monthly experience shared by women around the world.”
“The preliminary data we are sharing today suggests women across the country have a shared experience of a wide range of menstrual symptoms, and that this natural monthly occurrence is something we should be having more discussions about,” said Dr. Shruthi Mahalingaiah, one of the study’s principal investigators, in a release.