Cases of semimonthly menstruation and many similar anomalies of periodicity are spoken of.
The Ephemerides contains an instance of the simulation of menstruation after death, and Testa speaks of menstruation lasting through a long sleep.

Instances of black menstruation are to be found, described in full, in the Ephemerides, by Paullini and by Schurig, and in some of the later works; it is possible that an excess of iron, administered for some menstrual disorder, may cause such an alteration in the color of the menstrual fluid.
Suppression of menstruation is brought about in many peculiar ways, and sometimes by the slightest of causes, some authentic instances being so strange as to seem mythical.

Through the Ephemerides we constantly read of such causes as contact with a corpse, the sight of a serpent or mouse, the sight of monsters, etc.

Lightning stroke and curious neuroses have been reported as causes.

Many of the older books on obstetric subjects are full of such instances, and modern illustrations are constantly reported.
Menstruation in Man .-- Periodic discharges of blood in man, constituting what is called "male menstruation," have been frequently noticed and are particularly interesting when the discharge is from the penis or urethra, furnishing a striking analogy to the female function of menstruation.