Why are Periods Important?

Written By Kirti Gaggar
Medically Reviewed By Dr. Yash Bahuguna, MBBS, MS, DNB, Medical Registration No. 110281
Last Updated: 27 July 2025
Read Time: 2 mins
Periods are important because it is the regular vaginal bleeding that occurs every month as part of the reproductive health cycle of women. Your body prepares for pregnancy every month between puberty (about the age of 11 to 16) and menopause (around the age of 51).
One of your ovaries releases an egg after it develops in your uterus. If fertilisation does not take place and you don't get pregnant, your estrogen and progesterone levels will drop until they reach a level that indicates that you'll begin menstruating. When your period starts, the uterine lining starts shedding itself and is removed along with some blood through the vaginal canal.
During their menstrual month, women of reproductive age loses roughly 2 to 3 tablespoons of blood. The average interval between the last day of your periods to the first day is 28 days, with bleeding lasting 4 to 5 days on average. People can, however, have completely "regular" cycles while having longer periods and fewer or more days of bleeding.
You may be having irregular periods if your menstrual cycle is less than 24 days, longer than 38 days, or fluctuates greatly from month to month. However, it depends on other factors as well. These factors could be stress, hormonal shifts, weight loss, excessive exercise, family history, birth control and so on.
Why do women bleed?
The importance of the menstrual cycle is that your body prepares you for pregnancy every month by shedding tissues that it no longer requires. During the process of nurturing a fertilised egg, the lining of your uterus thickens. An egg has been released and is ready to be fertilised and implanted in the uterine lining. If the egg is not fertilised, your body no longer needs the thicker uterine lining, so it begins to break down and is finally ejected from the vaginal canal, along with some blood. This is your period, and once it's finished, the cycle repeats itself.
Is there something to worry about?
Periods are necessary and a normal part of your life. Periods are important for pregnancy and helps your body to prepare for it. Your body expels tissue that it no longer needs to nurture a fertilised egg every month so that you do not become pregnant.
Consult your doctor or gynaecologist if you notice any irregularities in your monthly regularity, frequency, duration, or volume.1
Understanding your period is the first step toward better reproductive health. If anything feels off, talk to a Pinky Promise gynaecologist for clarity and care.
References
1 - Why Do Women Have Periods? ; From Healthline (https://www.healthline.com/health/why-do-women-have-periods). Retrieved on 19.04.2022
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