Women are fertile for an average of 40 years. They have their period every 28 days. That makes a total of 521 times. Women bleed for an average of 5 days. That makes a total of 2607 days, or about 7 years. Again, women bleed for 7 years. On average a woman loses about 150ml of blood during every period.
That makes 391 liters of blood in their life.
An average man has 6 liters of blood. It takes the blood of 65 men to measure up to one woman’s blood loss.