A period, or menstruation, is the time of the month when a woman sheds the lining of her uterus or womb. During a menstrual period, the blood passes from the uterus via a narrow opening in the cervix. Then it leaves the body through the vagina. Typically, a menstrual period lasts 3-5 days. The length and flow will vary from one woman to the next and may change throughout a woman’s life.
What is the menstrual cycle?
The menstrual cycle refers to the regular cycle of periods or menstruation. Consistent menstrual cycles indicate that a
women’s body is functioning properly. The cycle provides key body chemicals or hormones for regulating health. It also
prepares the body for pregnancy. A cycle count begins on day 1 of the period and runs through day 1 of the next period. The average menstrual cycle length is 28 daysi.
For teenagers, average cycles range from 21-45 days. For adults, average
cycles range from 21-35 days. Carefree provides a free period calendar tool that can help you better understand and plan for your period cycle.
What do women experience during typical menstrual periods?
During a period, you shed your thickened uterine lining and extra blood through the cervix opening and then the vagina,
which is how the substances leave the body. The menstrual flow may be light, moderate, or heavy. It’s not unusual for the
flow to be different from one month to the next or to change over time. Typically, a period lasts between three to five days.
Anywhere from two to seven days is considered normal. Generally, when teenagers first begin menstruating, their cycles are longer.
As women age, their cycles often shorten and become more regular.
When does a teenager girl typically get her first period?
In the United States, the average age for women to begin menstruation is 12. Beginning a period anywhere between ages eight and
15 is considered normal. Generally, a teenager girl begins her period approximately two years after her breasts begin to develop.
If a girl has not started her period by age 15 or has not started her period more than two or three years after her breasts have
started developing, consult with a physician.
How long does a woman have periods?
Women have regular periods until they reach menopause. Typically, menopause begins around age 50ii
and can begin anywhere between
ages 45 and 55. When menopause occurs, a woman is no longer ovulating or producing eggs and having periods, which means she can no
longer become pregnant. Like menstruation, menopause varies from one woman to the next and may change over the course over several
The stage of life in which menopause begins is referred to as the menopausal transition. Menopause lasts anywhere from two to
eight years. Some women experience early menopause due to illness, surgery, and other medical treatments. If you go 90 days without
a period, consult with your doctor. He or she will test for pregnancy, early menopause, and other health issues, which may result
in a period becoming irregular or stopping altogether.
After starting menstruation, there are a number of problems that may occur, including pain, heavy bleeding, and skipped periods.
Factors that may contribute to changes in menstrual periods include stress, eating disorders, significant weight loss, excessive
exercise, breastfeeding, pregnancy, and serious untreated medical issues.
Once you’ve started menstruating, it’s recommended to schedule yearly checkups with a gynecologist to ensure your menstrual cycle
is normal and the gynecologist can address any issues that do arise in a timely fashion. If you ever have questions about your
menstrual cycle, don’t hesitate to talk to your doctor.
Note: This article is for informational purposes only and does not constitute medical advice.
i. Information provided by Womenshealth.gov, 2017.
ii. Content distributed by Everyday Health Media, LLC– Menopause © 2017.
Ornstein, B, Marcellin, L. (2012, November 21) Why Menopause May Begin Earlier for Some Women [Blog Post].