Developmental defects of the penis, and acquired deformities of that
organ.
Stricture of the urethra.
Oligozoöspermia.
Nervous impotence.
Gonorrhoeal and syphilitic infection.
The employment of measures for the prevention of pregnancy
(facultative sterility).
III. STERILITY DUE TO INCAPACITY FOR THE IMPLANTATION AND FURTHER
DEVELOPMENT OF THE OVUM.