How much blood does woman lose during menstrual cycle?

Menstrual bleeding: Average menstrual bleeding is around 30-40 cc (ml.) abnormal heavy bleeding is defined as greater than 80 cc(ml.).

2-3 ounces: Sometimes a little more, if you are worried it is too heavy your gyn can do a work up and there are many options ranging from bc pills, lysteda, endometrial ablation which I do on many of my patients , wear a balloon is palced in teh uterus for 8 minutes and it gets rid of the lining so no more periods if you are done with fertlity.