Menstrual cycles today: how menstrual cycles vary by age, weight, race, and ethnicity – Apple Women's Health Study

November 2022: A person’s menstrual cycle length and regularity are key indicators of their overall health1. Menstrual cycles that are unusually long (more than 40 days) or are irregular have been …

How Does the Menstrual Cycle Impact Exercise & Nutrition?

Physiologia, Free Full-Text

Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles

Do periods sync? Lesbian, trans and queer couples respond to our research on menstrual syncing

Puberty 101: The Clue guide to getting your period (Part 1)

10 of the best period tracking apps for 2022

The Clue Encyclopedia: Women's Health, Menstrual Cycle Health, & Sex

Publications – Apple Women's Health Study

Irregular Periods: Causes of Irregular Menstrual Cycles

Findings from Apple Women's Health Study advance science around menstrual cycles - Apple (CA)

Does Syncing Your Workouts to Your Cycle Work?