The amount of blood lost during a period will vary from woman to woman, but, on average, a woman will lose about 6 - 8 teaspoons (30 - 40 ml) of blood per period. A loss of 80 ml or more, having a period longer than seven days, or both, is considered heavy. However, most women have a good idea of whether or not their bleeding is within the normal range for them.
Read more