Researchers from leading U.S. and Chinese universities analyzed women's menstrual cycles and found strong evidence linking irregularities to elevated premature mortality risks. For medical experts, the menstrual cycle remains a critical vital sign reflecting overall women's health.
A regular menstrual cycle indicates healthy function of the hypothalamic-pituitary-ovarian axis, serving as a key clinical marker of women's general health. Irregular cycles, however, may signal disruptions in this system. Prior studies have connected such irregularities to non-communicable diseases like type 2 diabetes, ovarian cancer, coronary heart disease, and mental health disorders.
Hypotheses point to underlying mechanisms, such as hormonal imbalances, hyperinsulinemia, chronic inflammation, or metabolic issues. Yet, data on menstrual irregularities and overall mortality has been scarce—until now. Published in the British Medical Journal on September 30, 2020, this comprehensive study sheds light on these vital connections.
Drawing from the Nurses' Health Study II—a robust cohort primarily of U.S. nurses—researchers from Harvard University, University of Michigan, and Huazhong University of Science and Technology examined menstrual patterns across key life stages: ages 14-17, 18-22, and 29-46. Results show women with irregular or abnormally spaced cycles face a 73% higher risk of premature death before age 70. This association strengthens among those with cardiovascular disease or who smoke.
The American Academy of Pediatrics long advocated viewing menstrual cycles as vital signs for adolescent health, but this research extends that insight to women of all reproductive ages. Experts urge healthcare providers to monitor cycle characteristics closely and encourage at-risk women to adopt lifestyle changes to mitigate long-term health risks.
