Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles User doctor_raye, in the Everything Science subreddit, 02 Sep 2019
Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles User Duntley, in the Reaction Paper Articles subreddit, 27 Aug 2019
Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles User mem_somerville, in the Reddit Science subreddit, 27 Aug 2019