Menstrual Blood Clot: Normal Blood Flow and Causes of Blood Clots

Menstrual clots are very common in women during the menstruation period. Menstrual clots are heard about very rarely because they do not cause any kind of disruption, discomfort, bloating or headache. It can be alarming for young women who have just started their menstruation cycle. It is quite normal if the blood varies in color and consistency throughout monthly periods.

Why are Menstrual Blood Clots Formed

These blood clots are usually formed when the clumps present on the uterus lining pass in the form of clots. During menstruation, the body of a woman tends to release anticoagulants in order to prevent clogging, but during heavy periods they may not have enough time to function properly, eventually leading to the formation of blood clots. However, these problems may sometimes indicate menstrual blood clot problems.

It is very important to consult a doctor about menstrual blood problems. Blood clots during menstruation can be due to the quick passing of blood by the body and it is quite normal most of the times. It is a part of natural coagulation system in the body that passes clots of quarter-sized or smaller blood clots during menstruation. This article also explains about the various rare menstrual bleeding disorders that occur in women.

Causes of Blood Clots

Fluctuations in hormones can cause blood clots during menstruation and Progesterone and Estrogen are responsible for this. They see to it that the body sheds the lining of the uterus every month.

The walls of uterus become thick if these hormones get out of balance. Women may experience heavy blood flow and more clots due to this. Menopause, excessive weight gain or loss and medications can lead to hormonal changes in the body. Hormone therapy can help in balancing the hormones in the body effectively.

  • Enlarged Uterus: This condition is usually seen in women after delivery, as the uterus expands and again shrinks back to its normal size after the birth of the child. In some cases, the uterus may not shrink resulting in passing heavy blood clots during periods.
  • Miscarriage: Blood clots and miscarriage are very closely related to each other. A woman may suffer from this condition if she has a past history of miscarriage. Women should consult a gynecologist immediately if they pass heavy blood clots during pregnancy.
  • Endometriosis: This condition is caused due to hormonal changes and it can lead to heavy blood clots during periods. This is usually caused when the tissues on the lining of the uterus grow at some other place than the usual place. Endometriosis is the main reason that causes this condition in most of the women during their periods.
  • Leiomyomas: This condition is also known as non-cancerous tumor or uterine fibroid and they are usually formed in the womb. Leiomyomas is a symptom of this condition which is responsible for passing blood clots. Women may not experience any kind symptoms if the fibroid is very small.
  • Blockage:Benign polypsis a condition that is responsible for the formation of blood clots during periods. Menopause is another condition due to which clots are passed as the cervical canal may become small due to low estrogen levels.
  • Medications: Certain medications like anticoagulants or steroids can also cause this condition. Oral contraceptive pills may cause hormonal changes which in turn results in this condition.


A woman suffering from heavy menstrual bleeding clots may experience the following symptoms.

  • Pale complexion
  • Anemic symptoms
  • Black or dark brown big clots
  • Fatigue
  • Menstrual cramps and
  • Menstruation cycle for more than 7 days

Normal Blood Clots

Blood fluids are thinned by anticoagulants that are released by the body during menstruation. Blood passes much before the anti-coagulation starts working if the flow is strong and it may clot as it is passed. This can be a sign of menstrual blood problem if you are passing clots that are bigger than a quarter on a regular basis.

Blood during menstruation can become dark brown or it may even turn to almost black by the end of menstruation and this is quite common and this usually happens when old blood does not get expelled from the body. Consult a doctor if the flow is heavy each and every time, this is because heavy blood loss may lead to Anemia. This can further cause weakness or fatigue.

Thick Blood Flow and Darker Blood Clots

Women who suffer from heavier blood flow may experience dark or bright red colored blood clots during their periods. Multiple blood clots can lead to thicker blood flow during menstruation. These blood clots play a major role in controlling the flow of blood.

Many women may also experience almost black or darker bleeding towards the end of periods. This happens when the old blood which is left behind in the uterus is expelled out and it is quite common. Consult a doctor if you experience this condition regularly as it can further lead to long term complications like fatigue, weakness and anemia. Make sure that you include healthy foods in your diet as this helps in overcoming the condition of menstruation blood clots.


A woman suffering from heavy menstrual bleeding clots can follow the below mentioned treatment steps.

  • Consult a doctor immediately if the symptoms of this condition remain for longer period of time.
  • Doctor may prescribe non-steroidal anti-inflammatory drugs (NSAID) as they help in reducing blood loss and restores to normal bleeding.
  • Oral progesterone drugs can be used if this condition occurs due to hormonal imbalance as they help in reducing excess bleeding.
  • Uterus can be removed with the help of surgical methods if there are tumors in it.
  • Menstruation cycle can be maintained properly by taking oral contraceptive pills.
  • Make sure that you include healthy foods in your diet in order to retain the lost blood.

Take a look at the rare menstrual bleeding disorders that women experience during their menstruation.

  • Abnormal Uterine Bleeding: This is also referred as AUB where a woman may experience too much menstrual bleeding during the cycle. A woman may lose at least 10 to 20 times more blood than during the normal period. This can be caused due to structural activities that happen in the uterus, miscarriages and hormonal imbalances. Blood clots, leukemia and thyroid problems are a few other medical conditions that are responsible for causing this condition.
  • Hypomenorrhea: A woman suffering from this disorder can experience a light blood flow during her periods. You can observe spotting as a symptom and this problem is common among people with kidney diseases and thyroid conditions.
  • Amenorrhea: This condition usually occurs in the absence of menstruation cycle. This usually occurs in women before puberty, after menopause or during pregnancy. This condition is of two types and they are ai??i?? primary and secondary amenorrhea. Primary amenorrhea is generally observed in women who do not menstruate at 16 years of age also. This can happen mainly due to hormone regulations. Secondary amenorrhea is observed in people who skip their periods for three months continuously. This can occur due to illness and stress affecting the estrogen levels.
  • Premenstrual Dysphoric Disorder (PMDD): Around 3 to 5% of the women suffer from PMDD. PMS and PMDD can be differentiated according to the severity and level of the symptoms. Women suffering from this condition may experience migraine, headache, anxiety, depression and mood swings
  • Dysmenorrhea: This is also called as menstrual pain and is divided into two types and they are ai??i?? primary and secondary dysmenorrhea. Women suffering from primary dysmenorrhea may experience cramps. Women with secondary dysmenorrhea can experience sweating, vomiting and dizziness.

These are the various rare menstrual bleeding disorders that are commonly observed in many women. Consult a doctor immediately if you observe any kind of abnormalities during menstruation.

Comments are closed.