Theses de suppressis mensibus

I.
About to treat of Menses menstrual cycles, it has pleased us first to bring forward and premise several medical questions necessary for understanding the menstrual blood.

II.
The matter of this indeed appears to be redundant blood, which is neither consumed for the nutrition of the parts of the female body, nor could it yield and pass into true semen.

III.
We place its form not in a corrupt and poisonous quality, but in a simple crudity a state of being uncooked or undigested.

IV.
We understand this crudity, however, not in comparison to the rest of the blood of the female body by which it is nourished (for in that way it is no less cooked and elaborated than that by which other parts in the woman’s body are nourished), but because it has not attained the extreme degree of perfection by which, namely, it might be converted into semen. Perhaps also with respect to the blood which, redundant in males and more fully cooked by their larger and more valid heat, passes not only into hylen matter, but also into poietikon creative semen, it could draw the name of raw.