It can feel almost impossible to accurately estimate how much you have bled during your period by just looking at your tampon before throwing it in the trash.

A regular absorbent tampon can typically contain 6 to 9 grams of blood, but you may not always fill an entire tampon before changing it. Plus, you may not even use the same type of menstrual care product to absorb or collect blood throughout your period.

For answers on how much blood one typically loses over a period of time, we turned to Lucky Sekhon, MD, a fertility specialist in New York City and board-certified ob-gyn.

As Dr. Sekhon explained, the average person who menstruates loses less than 80 ml of blood during their period. That equates to a little more than five tablespoons or a third of a cup. As a reminder, the average period lasts between two and seven days.

However, some people who menstruate bleed for longer than seven days and may lose more than 80 ml of blood per day. Cycle. Dr. Sekhon said this condition of moderate to severe bleeding that lasts longer than a week is known as menorrhagia.

According to the Cleveland Clinic, two signs associated with having menorrhagia include replacing a pillow or tampon after less than two hours or passing blood clots that are a quarter or larger in size. The Cleveland Clinic also says that menorrhagia can lead to anemia.

Dr. Sekhon recommends seeing your doctor if you show signs of anemia to have your iron and hemoglobin levels checked. Signs may include weakness, shortness of breath, palpitations, facial pallor, and extreme fatigue or intolerance to exercise.

If you think you are experiencing symptoms of anemia or menorrhagia, consult your doctor.