Five Probable Causes Of Large Clots During Menstruation

Large Clots During Menstruation

Women may observe clots in menstrual blood at certain times that can range from bright red to dark purplish in color. These are usually shed during the heaviest days of menstruation cycle. Due to presence of clots, the menstrual blood appears denser and thicker than usual. Normally the body releases anticoagulants to prevent clots in menstrual blood as it gets released.

But, during heavy flow, blood gets rapidly expelled without much time for anticoagulants to work and hence, result in large clots during menstruation. This is absolutely normal, if clots are formed on heavy days and not otherwise. In case, women experience much larger clots than usual or observe excessive clotting, then it is time for serious concerns. Do visit the gynecologist and get yourself examined as there could be varied reasons for abnormal clot formation.

Important Reasons For Large Clots During Menstruation

Miscarriage Or Spontaneous Abortion

Spontaneous abortion can be the underlying root cause of clots formation in women. These large clots usually expelled out through the body at any time and are not restricted only to menses days.

Spontaneous Abortion


But, in many women clots get expelled out during initiation of menstrual cycle only, confusing it to be caused either due to menstruation or due to pregnancy.

Enlarged Uterus

Uterus gets stretched during pregnancy and sometimes, may not return to its previous original size, remaining permanently enlarged. An enlarged uterus have large amounts of blood that collect and clot, before getting expelled from the vagina, resulting in thickening and dark color of menstrual flow.

Uterine Fibroids Or Leiomyomas

Uterine fibroids are the non cancerous tumors of the uterus, also referred as leiomyomas. The uterine fibroids get slough off from uterine wall in form of large clots. These fibroids usually do not show any symptoms other than that there is a chance of high amounts of menstrual blood than usual. If the menstruation clots are because of uterine fibroids development, then there will be high amounts of such clots during the period.

Uterine Fibroids


Hence, when women come across unusually high clots during menstruation, they should get it diagnosed to rule out formation of fibroids. Uterine fibroids are sensitive to estrogen hormone and will keep growing as long as women keep menstruating. These growing fibroids will lead to much large clots and heavy bleeding during menstruation.

Polycystic Ovary Syndrome

Women suffering from PCOS show large hormonal imbalances that lead to irregular menstrual cycles. Such irregular menses are usually prolonged with heavy bleeding comprising large blood clots.


Endometriosis causes the uterine tissue cells to grow outside the womb, resulting in excessive bleeding of tissues during menstruation at their located position. The process generates extreme pain forming blood clots. In adenomyosis, uterine tissue grows in the muscles of uterine walls, causing abnormal periods with thickened or clotted blood secretion.

Top 6 Causes Of Blood Clots During Periods


Normally, blood clots that may appear in menses blood are in small sizes. But, when these become large and atypical clots, an evaluation by the doctor is significant as any health complication responsible for blood clot formation can be easily managed. In case, something is more serious, it can be cured by gynecological treatment.