Abnormal menstruation: Why does it happen?

Every 28 days, a woman normally goes through the cycle of menstruation. It is termed abnormal if the cycle is longer than 35-38 days or when a woman misses her cycle in a row for three or more times. The condition is also commonly known as irregular periods or oligomenorrhea in medical terms.

Heavier or light menstrual flow or periods that continue for more than 7 days is also characterized as abnormal.

Causes of abnormal menstruation

There could be multiple causes of irregular periods. Let us have a look at some of them:


It could be the most common cause of missing periods. In case you have had intercourse with your partner and you miss your periods, you can take a pregnancy test or consult with a gynecologist.

Thyroid problem

Women who have thyroid problems also witness heavier and lighter menstrual flow.


Abnormality in menstruation can be an outcome of being overweight also as too much weight impacts hormones and the levels of insulin in the body that can cause interference with the cycle of menstruation.

Polycystic ovary syndrome (PCOS)

Women suffering from PCOS commonly miss their cycles. In case they have periods, it is very heavy.

Uterine fibroids and Endometriosis

Both conditions cause heavy bleeding and painful menstrual cramps. The bleeding due to fibroids is as much to cause anemia, while endometriosis can cause heavy, prolonged periods or there could even be periods in between.

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