How Much Blood is Lost During A Period?

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Medically Reviewed by Dr. Monika Dubey
Written by Charu Shrivastava, last updated on 9 March 2023
How Much Blood is Lost During A Period?

For women, periods are a natural and unavoidable part of life. But how much blood is lost during a period in the monthly menstrual cycle? 

It might not seem like an important question to ask, but it's essential to understand how much blood is lost during a periods per day or each month. This blog post will discover the science behind the amount of blood that is typically lost during a period. Read on to find out more about understanding your body and its needs!

Average Amount of Blood Lost During a Period

The average amount of blood loss during a period is about 30 to 40 millilitres. This amount can vary from person to person and from period to period. Some women may lose as little as 10 millilitres of blood during their period, while others may lose up to 80 millilitres. 

How much blood is lost during a period each day also varies depending on the length of the menstrual cycle. For example, women with shorter cycles (21 days or less) may lose more blood than women with longer cycles (35 days or more).

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Ways to Measure Blood Loss During a Period

Blood loss during periods can vary from woman to woman, and monitoring and tracking the amount of blood loss is essential. There are various ways by which one can measure blood loss during a period, some of which include the following.

When Wearing the Menstrual Cup

When wearing a menstrual cup, it is easy to tell how much blood is lost during a period. This can be carried out as follows:

  1. Inspecting the cup after removal from your body and emptying its contents into a bowl or sink. 
  2. Measure how much fluid was collected in millilitres. 
  3. It is considered heavy bleeding when the blood collected is greater than 60 millilitres. Checking the colour of your menstrual fluid may help you determine how heavy or light your flow is—darker colours usually indicate heavier flows. It is important to remember that every period varies greatly in amounts of flow, so there isn't one universal measurement for what constitutes heavy or light bleeding.

When Wearing Tampons, Pads, or Period Underwear

If you are wearing a tampon, pad or period underwear, it can be difficult to tell how much blood is lost during a period. The best way to determine this is to pay attention to the following:

  1. The flow of your period and check your products regularly throughout the day. 
  2. Any signs of saturation (e.g., staining on the fabric) as well as any clots that may indicate heavier bleeding than usual. 
  3. Additionally, if using a tampon or period underwear, keep track of how often you need to change them to get an idea of how much you're bleeding each day. If the amount of blood seems excessive, it may be worth seeing a doctor just in case there is an underlying issue causing heavy menstrual flows that needs addressing.

How to Calculate the Amount of Blood during Period?

The actual blood content during a period can be calculated by tracking the amount of menstrual blood loss. Generally, women lose an average of 30 to 40 ml (1 to 2 ounces) of menstrual fluid during each cycle. The total number of days in the cycle and the amount lost per day should be taken into account when calculating the actual blood content.

Here's an easy formula:

  1. Count how many days you bleed for in your period and record this information on a calendar or spreadsheet. 
  2. Measure how much menstrual fluid is present on each pad or tampon that you change throughout your period, then note it down with the date associated with it, so you get an idea about how much you're losing over time. 
  3. Once all these values are collected, add up all amounts to estimate the total volume lost within one cycle and divide this by several days to determine the daily average loss rate. 
  4. Multiply the daily average loss rate by the total duration in days to calculate the actual blood content shed through menstruation during that particular month/cycle.

Factors Affecting Menstrual Bleeding

There are many reasons behind heavy menstrual bleeding, which is defined as losing 80 millilitres or more of blood during your period. While heavy bleeding can be a nuisance, it is not usually a sign of a severe underlying health condition. However, if you have heavy or lesser than normal bleeding and are also experiencing other symptoms like severe abdominal pain or fever, you should see a doctor to rule out any potential problems.

Reasons for Heavy Menstrual Flow

  1. Hormonal Imbalance: Hormonal imbalances can alter the production of estrogen and progesterone, leading to irregular periods, which can be characterised by abnormal bleeding during menstruation.
  2. Uterine Fibroids/Polyps: Non-cancerous growths in the uterus called fibroids or polyps are often increase blood flow to that area, causing more intense cramping and longer-lasting periods with a heavier flow than usual. 
  3. Endometriosis: Endometriosis is a condition in which tissue equivalent to the lining of the uterus grows outside its walls. It is linked with abnormally heavy menstrual flows due to excess tissue buildup before each period begins.
  4. Birth Control Pills: Taking birth control pills (oral contraceptives) may lead to heavier than normal menstrual flow as they contain hormones that help regulate menstrual cycles. 
  5. Stress and Anxiety: High levels of stress and anxiety can contribute towards premenstrual syndrome (PMS) symptoms, including mood swings, depression and irritability which may all eventually lead to heavier menstrual cycles. 
  6. Medications: Certain medications prescribed for treating chronic illnesses like thyroid disorder, diabetes etc., can disrupt hormone levels in the body resulting in thicker than normal uterine lining shedding.
  7. Pelvic Inflammatory Disease (PID): PID is an infection occurring inside reproductive organs like the vagina, uterus, cervix etc. It increases the chances of pelvic inflammation resulting in heavy discharges during menses

Reasons for Lower than Normal Menstrual Flow

  1. Hormonal Imbalance: A disruption of the hormones responsible for regulating menstrual cycles can lead to lower-than-normal flow during periods. It causes a decrease in the production of progesterone and estrogen hormones, leading to lighter bleeding. 
  2. Stress: High-stress levels can also affect hormone levels, leading to lighter periods or even skipped ones altogether. Stress has been linked with an augment in cortisol, which directly correlates with progesterone and estrogen levels needed for regular menstruation. 
  3. Diet: Certain diets, such as vegetarian or vegan, that are low in essential nutrients like zinc can cause hormonal imbalances that could lead to reduced flows during menses. 
  4. Medication/Contraceptives: Certain medications, including antibiotics or anti-depressants, might interfere with hormonal balance causing light flow during periods.
  5. Age factor: As women age, the amount released monthly decreases due to fewer eggs being produced each month; this is especially true around menopause when many experience irregularity and extreme lightness. 
  6. Uterine Fibroids/ Polyps: These non-cancerous growths found inside the uterus can create blockages at the cervix, making it difficult for lining and blood vessels to obstruct proper outflow, thereby decreasing the amount discharged each month.

Lifestyle Changes to Manage Menstrual Flow

Making lifestyle changes is an effective way to manage the menstrual flow. These changes can help reduce symptoms such as cramps, heavy bleeding, and irregular cycles. Check out these lifestyle changes:

Heavier than Normal Menstrual Flow

  1. Exercise: Regular physical activity can help to reduce the intensity of heavier menstrual flow, such as walking, jogging, swimming and biking. Make a goal of doing at least 30 minutes of exercise thrice a week.
  2. Diet: Eating nutritious foods that are rich in iron, like red meat, poultry, fish, and leafy greens, can help reduce heavier bleeding during periods over time. Also, avoiding processed foods and sugary snacks helps reduce symptoms associated with heavy menses.
  3. Herbal Remedies and Supplements: Taking natural herbs like ginger or chamomile tea may be useful in managing the effects of heavier menstrual flow by helping to relax muscles and decrease the cramping pain associated with it. Additionally, taking supplements such as Vitamin B12 or Iron can also be beneficial in restoring balance to your body's hormones which will ultimately help regulate your period over time too! 
  4. Stress Management Techniques: Relaxation techniques such as yoga, tai chi or meditation have been known to reduce stress levels which can ease both physical and emotional symptoms caused by heavy periods, including cramps, fatigue and bloating. 
  5. Sleep Cycle Regulation: Getting adequate sleep helps keep hormones balanced, which reduces blood loss from menstruation due to its calming effect on our body's overall health, so getting 8 to 9 hours of restful sleep per night is essential when trying to lessen discomfort from a heavy period each month!  
  6. Avoid Alcohol and Caffeine: Consuming alcohol and caffeine has been linked to a higher risk of having an abnormally heavy period, so limiting their intake should be considered when trying to manage this symptom effectively!

Lower than Normal Menstrual Flow

  1. Eat healthily: Eating a balanced diet of fresh fruits, vegetables, proteins, and whole grains is essential for maintaining normal menstrual flow. Avoiding processed foods high in preservatives and unhealthy fats can also help regulate your hormones, leading to healthier periods.
  2. Reduce stress: Stress affects many aspects of our lives, including our reproductive health, so reducing stress levels is essential if you want healthy periods. Yoga, meditation or mindfulness practices are good ways to manage stress effectively without sacrificing other areas like work or family commitments. 
  3. Get enough sleep: Sleep deprivation has been linked with changes in hormone production which can affect your monthly cycle; be sure to get 8 hours of restful sleep each night where possible. 
  4. Take supplements/herbs: Some herbs such as cinnamon bark, ginger root and maca root – are known for their ability to support hormonal balance; adding these into your daily routine may help regulate your period naturally over time.  
  5. Drink plenty of water: Staying hydrated throughout the day is always important for overall health, especially when dealing with period problems; drinking 6-8 glasses daily helps keep toxins flushed out from the body while helping maintain regular hormone production.

When to Consult a Doctor?

Different women experience varying levels of blood loss and menstrual flow during their periods. Generally speaking, if you are losing more than 80 ml of fluid each cycle, then this could be considered heavy bleeding. If you experience excessive blood loss during menstruation, it is essential to consult your doctor as soon as possible.

You should always consult with a medical professional in case of the following: 

  1. The period lasts longer than seven days or lasts two days. 
  2. An unusually heavy or lower-than-optimal flow (soaking through several sanitary pads/tampons per hour). 
  3. Feeling weak or dizzy due to a lack of iron. 
  4. Passing large clots (larger than the size of a quarter). 
  5. Having severe abdominal pain or cramping associated with menstruation. 
  6. The period has suddenly changed from being normal to very heavy or none. 

Takeaway

In conclusion, how much blood is lost during a period varies from person to person. Most women lose between 30 and 80 ml of blood per cycle, which is about 6 to 9 teaspoons. It's essential to be conscious of any modifications in the volume or colour of your menstrual bleeding so you can take protective steps for your health. If you detect anything uncommon with your period, it's best to consult your healthcare provider as soon as possible.

Period blood flow should not be ignored. Menstrual health and the amount of blood flow during your menstrual cycle can provide important insight into overall health and well-being. HexaHealth experts will connect you with the right specialist to discuss your menstrual flow, determine if it is healthy, and provide personalised treatments tailored specifically for you.

With years of experience in providing women's healthcare solutions, their experts are committed to helping you understand what is normal for your body and maintaining a healthy reproductive system. Don't hesitate any longer; book an appointment today!

Frequently Asked Questions

How much blood is lost during a period?

The average amount of blood lost during a period is around 30 to 80 millilitres, which is roughly equivalent to 6 to 9 teaspoons. However, this can vary from person to person due to hormonal changes and other factors.

What is period blood made up of?

Period blood is made up of endometrial tissue, cervical mucus, vaginal secretions, and bacteria. It also contains red blood cells and proteins from the body's natural defence system.

How much blood do you lose on your period in cups?

The amount of blood loss during a period can vary greatly from person to person, so it is hard to ascertain exactly how much in cups. Generally speaking, though, most women lose between 30-60 ml (0.3 to 1 cup) of blood each cycle.

How much period blood is actual blood?

The amount of period blood that is actually blood varies from person to person. Generally speaking, it is estimated that between 30 and 40 percent of the total volume of the period, fluid is made up of blood. The rest consists mostly of endometrial tissue, mucus, and other secretions from the vagina.

How much blood can a pad hold?

The amount of blood a pad can hold depends on its size and absorbency. Generally, an average-sized sanitary pad holds up to 5 ml of menstrual blood. Super-absorbent pads are available, which can hold between 10 ml of menstrual fluid.

Why is my period so heavy and clotty?

There are many potential causes of a heavy and clotty period. These could include hormonal changes, an underlying medical condition such as endometriosis or polycystic ovary syndrome, certain medications, pregnancy-related issues, or even stress and lifestyle factors. 

How many pads usage in a day is normal?

The number of pads that a person needs to use in a day will vary depending on their individual menstrual cycle. Generally, it is recommended to change your pad or tampon every 4 to 6 hours or whenever you feel the need to do so. It is crucial to note that you may need more frequent changes if you experience heavy bleeding during menstruation.

Can you donate period blood?

No, unfortunately, it is not possible to donate period blood. Donating blood requires the donor to be healthy and in good medical condition. Many of the components found in the menstrual fluid would make a donation unsuitable for transfusion into another person, so there is no way to donate period blood.

How much does a woman bleed in her lifetime?

The amount of blood a woman will lose in her lifetime varies depending on several factors, like health status and whether or not she has given birth. Generally speaking, women lose an average of 30 to 40 teaspoons (approximately 1 to 2 ounces or 30 to 80 mililiters) of menstrual fluid each month during their reproductive years. This can add up to between 240 and 480 teaspoons (8 to 16 ounces) annually and potentially 3 to 4 quarts throughout her life.

Do Menstruation (periods) get heavier as you age?

In general, it is normal for a woman's menstrual cycle to change as she ages. Most women have lighter periods during their teenage years and heavier periods as they approach menopause. Additionally, the amount of blood flow may increase due to hormonal changes that occur with ageing. However, every woman's body is different, and some may not experience any noticeable difference in the heaviness of their periods over time.

Updated on : 9 March 2023

Reviewer

Dr. Monika Dubey

Dr. Monika Dubey

MBBS, MS Obstetrics & Gynaecology

21 Years Experience

A specialist in Obstetrics and Gynaecology with a rich experience of over 21 years is currently working in HealthFort Clinic. She has expertise in Hymenoplasty, Vaginoplasty, Vaginal Tightening, Labiaplasty, MTP (Medical Termination...View More

Author

Charu Shrivastava

Charu Shrivastava

BSc. Biotechnology I MDU and MSc in Medical Biochemistry (HIMSR, Jamia Hamdard)

2 Years Experience

Skilled in SEO and passionate about creating informative and engaging medical content. Her proofreading and content writing for medical websites is impressive. She creates informative and engaging content that educ...View More

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