"Suppression of menstrual periods to provide relief of menstrual-related symptoms has been used in a variety of medical conditions since the availability of steroid hormone therapy. This option has gained legitimacy through its use in treating symptoms, but is now being used more frequently by women for personal preference. A recent Cochrane review of trials comparing 28-day and extended cycles found comparable contraceptive efficacy and safety.1 The review found overall discontinuation rates and discontinuation for bleeding problems to be similar. Extended cycling resulted in improved headaches, genital irritation, tiredness, bloating, and menstrual pain."
January 1, 1970
https://en.wikiquote.org/wiki/Menstruation