Do menstrual cycles change?
Women may also find that their menstruation cycle is changing before menopause. Women can experience age-related menstrual changes as early as their 30's. Some of the changes that women can experience include: A change in periods - shorter or longer, lighter or heavier, with more or less time in between.
Menstrual cycles vary between women and are measured from the first day of the period to the first day of the next period. In adolescents a cycle may be as long as 45 days, however by the 20s-30s a cycle is usually between 21-38 days. Periods change over a woman's lifetime.
- Causes of Prolonged Menstrual Bleeding. You may hear your doctor use certain medical terms when referring to irregular or prolonged menstrual bleeding. Menorrhagia describes a period that is very heavy or long lasting. Polymenorrhea refers to irregular bleeding for spans of 21 days or less.
- It is common for women to experience cycles that last anywhere from 20 to 40 days. Cycles longer than six weeks are considered unusual. The length of a women's menstrual cycle can change throughout her life. Irregular periods are common among adolescent women, and in women approaching menopause.
- The menstrual cycle, which is counted from the first day of one period to the first day of the next, isn't the same for every woman. Menstrual flow might occur every 21 to 35 days and last two to seven days. For the first few years after menstruation begins, long cycles are common.
Updated: 2nd October 2019