Culture and menstruation the ideal of synchronised tidal, lunar, menstrual and seasonal periodicities whose overall harmony (it is believed) confers spiritual power and fertility. To many, such cultural associations appear persuasive in view of the fact that in humans, the menstrual cycle quite closely approximates the moon's 29.5-day synodic cycle, unlike in chimpanzees (~36 days) or bonobos (~40 days). Statistical information from hunter gatherers is lacking, but where large-scale western studies focus on women's peak reproductive years—removing outlier values—the cycle length gravitates around 29.1–29.5 days, while the figure for women in their thirties shortens toward 28 days. In no extant human population has
Menstrual Hygiene Day related to menstrual hygiene management includes four aspects: awareness, access, use as well as waste management. The term “menstrual health” is broader than menstrual hygiene. It encompasses both the menstrual hygiene management practices and the broader systemic factors that link menstruation with health, well-being, gender, education, equity, empowerment, and human rights (in particular the human right to water and sanitation). Menstrual hygiene day is meant to serve as a platform to bring together individuals, organisations, social businesses and the media to create a united and strong voice for women and girls around the world, helping to break the silence about