Women are seldom afflicted with varicose veins, with haemorrhoids,
or with bleeding at the nose, and, if any of these maladies supervene,
the menses are imperfectly discharged.

Blood differs in quantity and appearance according to age; in very
young animals it resembles ichor and is abundant, in the old it is
thick and black and scarce, and in middle-aged animals its qualities
are intermediate. In old animals the blood coagulates rapidly, even
blood at the surface of the body; but this is not the case with
young animals. Ichor is, in fact, nothing else but unconcocted
blood: either blood that has not yet been concocted, or that has
become fluid again.