Theses de suppressis mensibus

V.
Just as it happens to the matter of menstrual blood sometimes with any other redundancy of blood, through which plethora an excess of bodily fluids is evacuated in women: so by the same reason of form it happens that, on account of the cacochymia bad humors of the humors mixed therein, it draws a malignant and poisonous quality.

VI.
The principal end of menstrual blood, according to the institution of nature, is that from it, sent to the uterus, the constitution of a new animal may be made.

VII.
Since this cannot happen always, the excretion of the same blood through the uterus supervenes to the principal end. For just as if a woman could always conceive, the Menses would never flow: so, with conception frustrated, it is necessary by a set law of nature that the same be led out of the body for the health of the woman.

IIX.
By this very occasion also, nature sometimes uses the evacuation of superfluous and useless humors in the woman’s body.

IX.
The efficient cause of menstrual blood is a strong natural heat, if you look at its haematopoietiken blood-making power, since it seems to provide fodder liberally not only to its own but also to an alien body: it is weak, however, if you weigh the frustration of haematopoieseos blood-making.

X.
Concerning the generation, collection, and excretion of menstrual blood...