Menstruation menarche has changed little in the United States since the 1950s. Menstruation is the most visible phase of the menstrual cycle and its beginning is used as the marker between cycles. The first day of menstrual bleeding is the date used for the last menstrual period (LMP). The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women, and 21 to 31 days in adults (an average of 28 days). Perimenopause is when fertility in a female declines, and menstruation occurs less regularly in
Menstrual leave days of "menstrual leave" per month, which will not be calculated toward the 30 days of "common sick leave", giving women up to 33 days of "health-related leaves" per year. The extra three days do not come with half-pays once a woman employee exceeds the regulated 30. Menstrual leave Menstrual leave is a type of leave where a woman may have the option to take paid or unpaid leave from her employment if she is menstruating and is unable to go to work because of this. Menstrual leave is controversial because it is seen by some as a criticism of