Menstrual cycle shortest and longest cycle lengths is considered very irregular. The average menstrual cycle lasts 28 days. The variability of menstrual cycle lengths is highest for women under 25 years of age and is lowest, that is, most regular, for ages 25 to 39. Subsequently, the variability increases slightly for women aged 40 to 44. The luteal phase of the menstrual cycle is about the same length in most individuals (mean 14.13 days, standard deviation 1.41 days) whereas the follicular phase tends to show much more variability (log-normally distributed with 95% of individuals having follicular phases between 10.3 and 16.3 days).
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