Menstrual Blood Clots: From a Normal Occurrence to a Warning Sign of Serious Women’s Health Conditions

Monday, May 04, 2026

SAEDNEWS: The passage of blood clots during menstruation is often a normal occurrence. However, when these clots are large, frequent, and accompanied by severe pain, they may signal serious conditions such as polycystic ovary syndrome (PCOS), endometriosis, uterine fibroids, or polyps. This is an issue that requires prompt medical evaluation.

Menstrual Blood Clots: From a Normal Occurrence to a Warning Sign of Serious Women’s Health Conditions

According to the Saed News medical service and Health News, the discharge of blood clots during menstruation is a phenomenon that every woman experiences during her reproductive years. Although these clots may seem alarming, in most cases passing clots with menstrual blood is completely normal, even when the clots are relatively large. However, while clotting during menstruation can be normal, it is important to know when it may indicate a more serious problem.

Normally, the blood produces anticoagulant factors that help maintain its fluid state and prevent clotting. However, when menstrual flow is heavy, these anticoagulant factors may not have enough time to act, resulting in the formation of blood clots. This is generally considered a natural occurrence during menstruation.

Blood clots become a cause for concern when they are larger than the size of a fist, occur excessively throughout the menstrual period, continue after menstruation ends, or are accompanied by pain.

Polycystic Ovary Syndrome (PCOS)

Polycystic ovary syndrome is one of the most common hormonal disorders in women. In this condition, the balance between female hormones—estrogen and progesterone—is disrupted. This imbalance can lead to abnormal and heavy bleeding, often accompanied by clot formation.

Endometriosis

Endometriosis occurs when the tissue lining the inside of the uterus (the endometrium) grows outside the uterus. This tissue behaves like uterine lining and bleeds during menstruation. Because it is located outside the uterus, the blood may accumulate in small amounts and appear as larger clots during menstruation. Endometriosis is also associated with pain.

Uterine Fibroids

Uterine fibroids are a common condition during reproductive years. It is estimated that one in five women may have fibroids. The good news is that fibroids are benign (non-cancerous) growths. They develop inside the uterine cavity or in the uterine wall.

Fibroids may initially be very small but can grow over time. Most women have more than one fibroid. These growths are sensitive to estrogen. During menstruation, when hormone levels rise, fibroids may increase in size, leading to heavy bleeding and large blood clots.

Polyps

Uterine polyps are growths that develop in the inner lining of the uterus and protrude into the uterine cavity. If they become large, they can partially block menstrual blood flow, which may accelerate clot formation.

Other Chronic Factors

Other factors that disrupt hormonal balance may also lead to menstrual blood clots. These include sudden weight gain or loss, long-term steroid use, hormonal changes due to menopause, or the use of hormonal medications for fertility or other conditions.

During pregnancy, the uterus expands to accommodate the growing baby. After childbirth, it contracts to return to its normal size. If the uterus does not contract properly, blood may accumulate inside it and later be expelled as large clots during menstruation.

If large blood clots occur regularly and are accompanied by painful contractions, it is important to take them seriously and consult a healthcare professional.